./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash 4f966bbb701fa0020ebf49f98d5faa7f02bbc3a28868891c6c7ff0a45fb5b1ff --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:38:00,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:38:00,204 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:38:00,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:38:00,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:38:00,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:38:00,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:38:00,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:38:00,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:38:00,247 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:38:00,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:38:00,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:38:00,248 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:38:00,248 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:38:00,249 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:38:00,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:38:00,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:38:00,249 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:38:00,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:38:00,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:38:00,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:38:00,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:38:00,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:38:00,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:38:00,256 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:38:00,256 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:38:00,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:38:00,267 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:38:00,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:38:00,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:38:00,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:38:00,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:38:00,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:00,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:38:00,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:38:00,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:38:00,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:38:00,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:38:00,272 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:38:00,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:38:00,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:38:00,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:38:00,273 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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/certificate-witnesses-artifact/automizer/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/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f966bbb701fa0020ebf49f98d5faa7f02bbc3a28868891c6c7ff0a45fb5b1ff Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:38:00,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:38:00,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:38:00,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:38:00,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:38:00,632 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:38:00,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i [2024-09-25 11:38:02,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:38:02,408 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:38:02,409 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i [2024-09-25 11:38:02,423 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c2aa4c1cb/0d14bfde78ab4e6383a5af4a3a740900/FLAG455555b9b [2024-09-25 11:38:02,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c2aa4c1cb/0d14bfde78ab4e6383a5af4a3a740900 [2024-09-25 11:38:02,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:38:02,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:38:02,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:02,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:38:02,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:38:02,463 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:02" (1/1) ... [2024-09-25 11:38:02,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e558b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:02, skipping insertion in model container [2024-09-25 11:38:02,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:02" (1/1) ... [2024-09-25 11:38:02,492 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:38:02,654 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i[1555,1568] [2024-09-25 11:38:02,703 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructOtherUnaryFloatOperation(IntegerTranslation.java:610) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.handleUnaryFloatFunction(StandardFunctionHandler.java:2721) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.translateStandardFunction(StandardFunctionHandler.java:253) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1586) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:271) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:789) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:286) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1494) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:224) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.handleCompoundStatement(CHandler.java:1150) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1133) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:236) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.FunctionHandler.handleFunctionDefinition(FunctionHandler.java:387) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1613) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:159) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3471) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2497) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:639) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:135) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:189) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:116) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:145) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-09-25 11:38:02,711 INFO L158 Benchmark]: Toolchain (without parser) took 268.59ms. Allocated memory is still 62.9MB. Free memory was 28.2MB in the beginning and 33.2MB in the end (delta: -5.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2024-09-25 11:38:02,712 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 32.8MB in the beginning and 32.8MB in the end (delta: 34.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 11:38:02,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.77ms. Allocated memory is still 62.9MB. Free memory was 28.0MB in the beginning and 33.2MB in the end (delta: -5.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2024-09-25 11:38:02,713 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 32.8MB in the beginning and 32.8MB in the end (delta: 34.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 265.77ms. Allocated memory is still 62.9MB. Free memory was 28.0MB in the beginning and 33.2MB in the end (delta: -5.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: UnsupportedOperationException: floating point operation not supported in non-bitprecise translation: sqrt: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructOtherUnaryFloatOperation(IntegerTranslation.java:610) 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: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash 4f966bbb701fa0020ebf49f98d5faa7f02bbc3a28868891c6c7ff0a45fb5b1ff --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 11:38:04,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:38:04,702 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-25 11:38:04,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:38:04,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:38:04,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:38:04,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:38:04,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:38:04,744 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:38:04,744 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:38:04,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:38:04,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:38:04,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:38:04,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:38:04,751 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:38:04,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:38:04,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:38:04,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:38:04,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:38:04,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:38:04,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:38:04,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:38:04,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:38:04,755 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-25 11:38:04,755 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-25 11:38:04,756 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:38:04,756 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-25 11:38:04,756 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:38:04,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:38:04,757 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:38:04,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:38:04,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:38:04,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:38:04,758 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:38:04,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:04,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:38:04,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:38:04,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:38:04,759 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-25 11:38:04,760 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-25 11:38:04,760 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:38:04,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:38:04,763 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:38:04,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:38:04,764 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-25 11:38:04,764 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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/certificate-witnesses-artifact/automizer/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/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f966bbb701fa0020ebf49f98d5faa7f02bbc3a28868891c6c7ff0a45fb5b1ff Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 11:38:05,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:38:05,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:38:05,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:38:05,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:38:05,130 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:38:05,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i [2024-09-25 11:38:06,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:38:06,816 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:38:06,825 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i [2024-09-25 11:38:06,834 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2e8d17c74/af7b71b07c214a52b7e67b3f65a9c304/FLAG49f093bc1 [2024-09-25 11:38:07,192 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2e8d17c74/af7b71b07c214a52b7e67b3f65a9c304 [2024-09-25 11:38:07,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:38:07,196 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:38:07,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:07,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:38:07,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:38:07,204 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243a4963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07, skipping insertion in model container [2024-09-25 11:38:07,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,234 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:38:07,393 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i[1555,1568] [2024-09-25 11:38:07,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:07,474 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:38:07,488 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_knuth.i[1555,1568] [2024-09-25 11:38:07,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:38:07,551 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:38:07,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07 WrapperNode [2024-09-25 11:38:07,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:38:07,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:07,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:38:07,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:38:07,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,578 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,590 INFO L138 Inliner]: procedures = 22, calls = 177, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:38:07,591 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:38:07,592 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:38:07,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:38:07,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:38:07,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,612 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,647 INFO L175 MemorySlicer]: Split 141 memory accesses to 10 slices as follows [2, 8, 20, 32, 16, 2, 24, 7, 21, 9]. 23 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0, 0, 0]. The 27 writes are split as follows [0, 0, 5, 5, 5, 1, 5, 1, 4, 1]. [2024-09-25 11:38:07,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,688 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,691 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,705 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:38:07,706 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:38:07,706 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:38:07,706 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:38:07,707 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (1/1) ... [2024-09-25 11:38:07,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:38:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:38:07,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 11:38:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 11:38:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:38:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-25 11:38:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-09-25 11:38:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-09-25 11:38:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-09-25 11:38:07,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2024-09-25 11:38:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2024-09-25 11:38:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#6 [2024-09-25 11:38:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#7 [2024-09-25 11:38:07,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#8 [2024-09-25 11:38:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#9 [2024-09-25 11:38:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:38:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:38:07,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:38:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:38:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 11:38:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_67_0 [2024-09-25 11:38:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_67_0 [2024-09-25 11:38:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:38:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:38:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-09-25 11:38:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-09-25 11:38:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#6 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#7 [2024-09-25 11:38:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#8 [2024-09-25 11:38:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#9 [2024-09-25 11:38:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:38:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:38:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:38:07,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2024-09-25 11:38:07,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#5 [2024-09-25 11:38:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#6 [2024-09-25 11:38:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#7 [2024-09-25 11:38:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#8 [2024-09-25 11:38:07,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#9 [2024-09-25 11:38:07,956 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:38:07,958 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:38:13,905 INFO L? ?]: Removed 26 outVars from TransFormulas that were not future-live. [2024-09-25 11:38:13,905 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:38:13,936 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:38:13,936 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 11:38:13,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:13 BoogieIcfgContainer [2024-09-25 11:38:13,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:38:13,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:38:13,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:38:13,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:38:13,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:38:07" (1/3) ... [2024-09-25 11:38:13,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540e5c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:13, skipping insertion in model container [2024-09-25 11:38:13,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:38:07" (2/3) ... [2024-09-25 11:38:13,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540e5c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:38:13, skipping insertion in model container [2024-09-25 11:38:13,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:38:13" (3/3) ... [2024-09-25 11:38:13,951 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_knuth.i [2024-09-25 11:38:13,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:38:13,970 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:38:14,040 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:38:14,050 INFO L336 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28ca498d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:38:14,051 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:38:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 11:38:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:38:14,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:14,064 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:14,065 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:14,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash -922732063, now seen corresponding path program 1 times [2024-09-25 11:38:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:38:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650671860] [2024-09-25 11:38:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:14,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-25 11:38:14,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:38:14,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-25 11:38:14,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-25 11:38:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:38:14,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-25 11:38:14,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:38:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 11:38:14,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:38:14,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-25 11:38:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650671860] [2024-09-25 11:38:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650671860] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:38:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:38:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:38:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458354947] [2024-09-25 11:38:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:38:14,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:38:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-25 11:38:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:38:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:14,570 INFO L87 Difference]: Start difference. First operand has 46 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 11:38:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:38:14,663 INFO L93 Difference]: Finished difference Result 86 states and 123 transitions. [2024-09-25 11:38:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:38:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-25 11:38:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:38:14,673 INFO L225 Difference]: With dead ends: 86 [2024-09-25 11:38:14,673 INFO L226 Difference]: Without dead ends: 40 [2024-09-25 11:38:14,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:38:14,680 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:38:14,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:38:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-25 11:38:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-25 11:38:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 11:38:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-09-25 11:38:14,719 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 24 [2024-09-25 11:38:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:38:14,719 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-09-25 11:38:14,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 11:38:14,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-09-25 11:38:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 11:38:14,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:38:14,722 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:38:14,738 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-09-25 11:38:14,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-25 11:38:14,923 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:38:14,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:38:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1810015387, now seen corresponding path program 1 times [2024-09-25 11:38:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-25 11:38:14,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813100743] [2024-09-25 11:38:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:38:14,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-25 11:38:14,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-25 11:38:14,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-25 11:38:14,929 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process