./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound1.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 03d7b7b3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -ea -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/nla-digbench-scaling/knuth_unwindbound1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash f7c2c0f04a8ec4985dc8297aaa6f2bb0534ef908d102354702fc27f17d7b5004 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:32:33,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:32:33,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:32:33,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:32:33,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:32:33,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:32:33,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:32:33,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:32:33,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:32:33,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:32:33,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:32:33,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:32:33,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:32:33,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:32:33,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:32:33,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:32:33,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:32:33,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:32:33,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:32:33,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:32:33,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:32:33,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:32:33,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:32:33,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:32:33,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:32:33,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:32:33,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:32:33,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:32:33,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:32:33,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:32:33,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:32:33,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:32:33,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:32:33,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:32:33,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:32:33,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:32:33,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:32:33,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:32:33,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:32:33,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:32:33,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:32:33,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-20 17:32:33,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:32:33,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:32:33,276 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:32:33,276 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:32:33,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:32:33,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:32:33,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:32:33,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:32:33,278 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:32:33,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:32:33,279 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:32:33,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-20 17:32:33,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:32:33,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:32:33,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:32:33,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:32:33,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:32:33,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:32:33,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:32:33,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:32:33,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:32:33,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:32:33,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-20 17:32:33,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-20 17:32:33,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:32:33,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:32:33,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:32:33,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7c2c0f04a8ec4985dc8297aaa6f2bb0534ef908d102354702fc27f17d7b5004 [2022-02-20 17:32:33,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:32:33,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:32:33,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:32:33,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:32:33,476 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:32:33,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound1.i [2022-02-20 17:32:33,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa2d742d/ee96821df594441ba646f509d57a2842/FLAG8cff61fce [2022-02-20 17:32:33,890 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:32:33,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound1.i [2022-02-20 17:32:33,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa2d742d/ee96821df594441ba646f509d57a2842/FLAG8cff61fce [2022-02-20 17:32:33,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaa2d742d/ee96821df594441ba646f509d57a2842 [2022-02-20 17:32:33,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:32:33,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:32:33,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:32:33,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:32:33,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:32:33,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:32:33" (1/1) ... [2022-02-20 17:32:33,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6494620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:33, skipping insertion in model container [2022-02-20 17:32:33,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:32:33" (1/1) ... [2022-02-20 17:32:33,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:32:33,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:32:34,028 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/nla-digbench-scaling/knuth_unwindbound1.i[948,961] [2022-02-20 17:32:34,049 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:848) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.handleUnaryFloatFunction(StandardFunctionHandler.java:1792) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.standardfunctions.StandardFunctionHandler.translateStandardFunction(StandardFunctionHandler.java:235) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1442) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:267) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:729) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:282) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1392) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:220) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1076) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:232) 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:1465) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:155) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.processTUchild(CHandler.java:3271) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2356) 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.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) 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) [2022-02-20 17:32:34,055 INFO L158 Benchmark]: Toolchain (without parser) took 146.25ms. Allocated memory is still 102.8MB. Free memory was 73.0MB in the beginning and 80.3MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 17:32:34,055 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-02-20 17:32:34,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.54ms. Allocated memory is still 102.8MB. Free memory was 72.7MB in the beginning and 80.3MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-02-20 17:32:34,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 102.8MB. Free memory is still 60.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 142.54ms. Allocated memory is still 102.8MB. Free memory was 72.7MB in the beginning and 80.3MB in the end (delta: -7.6MB). Peak memory consumption was 8.4MB. 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:848) 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 -ea -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/nla-digbench-scaling/knuth_unwindbound1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash f7c2c0f04a8ec4985dc8297aaa6f2bb0534ef908d102354702fc27f17d7b5004 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-03d7b7b [2022-02-20 17:32:35,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-20 17:32:35,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-20 17:32:35,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-20 17:32:35,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-20 17:32:35,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-20 17:32:35,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-20 17:32:35,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-20 17:32:35,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-20 17:32:35,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-20 17:32:35,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-20 17:32:35,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-20 17:32:35,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-20 17:32:35,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-20 17:32:35,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-20 17:32:35,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-20 17:32:35,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-20 17:32:35,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-20 17:32:35,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-20 17:32:35,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-20 17:32:35,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-20 17:32:35,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-20 17:32:35,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-20 17:32:35,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-20 17:32:35,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-20 17:32:35,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-20 17:32:35,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-20 17:32:35,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-20 17:32:35,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-20 17:32:35,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-20 17:32:35,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-20 17:32:35,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-20 17:32:35,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-20 17:32:35,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-20 17:32:35,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-20 17:32:35,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-20 17:32:35,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-20 17:32:35,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-20 17:32:35,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-20 17:32:35,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-20 17:32:35,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-20 17:32:35,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-02-20 17:32:35,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-20 17:32:35,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-20 17:32:35,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-20 17:32:35,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-20 17:32:35,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-20 17:32:35,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-20 17:32:35,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-20 17:32:35,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-20 17:32:35,672 INFO L138 SettingsManager]: * Use SBE=true [2022-02-20 17:32:35,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-20 17:32:35,673 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-20 17:32:35,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-20 17:32:35,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-20 17:32:35,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-20 17:32:35,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-20 17:32:35,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-20 17:32:35,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-20 17:32:35,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-20 17:32:35,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-20 17:32:35,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-20 17:32:35,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-20 17:32:35,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:32:35,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-20 17:32:35,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-20 17:32:35,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-20 17:32:35,676 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-02-20 17:32:35,676 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-02-20 17:32:35,676 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-20 17:32:35,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-20 17:32:35,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-20 17:32:35,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-20 17:32:35,677 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7c2c0f04a8ec4985dc8297aaa6f2bb0534ef908d102354702fc27f17d7b5004 [2022-02-20 17:32:35,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-20 17:32:35,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-20 17:32:35,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-20 17:32:35,989 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-20 17:32:35,990 INFO L275 PluginConnector]: CDTParser initialized [2022-02-20 17:32:35,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound1.i [2022-02-20 17:32:36,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ab2002f/22ec92bb5a4640259784a158899547d7/FLAGce33466e2 [2022-02-20 17:32:36,333 INFO L306 CDTParser]: Found 1 translation units. [2022-02-20 17:32:36,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_unwindbound1.i [2022-02-20 17:32:36,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ab2002f/22ec92bb5a4640259784a158899547d7/FLAGce33466e2 [2022-02-20 17:32:36,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39ab2002f/22ec92bb5a4640259784a158899547d7 [2022-02-20 17:32:36,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-20 17:32:36,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-02-20 17:32:36,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-20 17:32:36,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-20 17:32:36,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-20 17:32:36,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:32:36" (1/1) ... [2022-02-20 17:32:36,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630ae93d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:36, skipping insertion in model container [2022-02-20 17:32:36,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 05:32:36" (1/1) ... [2022-02-20 17:32:36,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-20 17:32:36,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-20 17:32:36,912 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/nla-digbench-scaling/knuth_unwindbound1.i[948,961] [2022-02-20 17:32:36,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:32:36,945 INFO L203 MainTranslator]: Completed pre-run [2022-02-20 17:32:36,971 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/nla-digbench-scaling/knuth_unwindbound1.i[948,961] [2022-02-20 17:32:36,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-20 17:32:37,008 INFO L208 MainTranslator]: Completed translation [2022-02-20 17:32:37,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37 WrapperNode [2022-02-20 17:32:37,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-20 17:32:37,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-20 17:32:37,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-20 17:32:37,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-20 17:32:37,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,040 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-02-20 17:32:37,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-20 17:32:37,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-20 17:32:37,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-20 17:32:37,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-20 17:32:37,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-20 17:32:37,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-20 17:32:37,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-20 17:32:37,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-20 17:32:37,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (1/1) ... [2022-02-20 17:32:37,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-20 17:32:37,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-20 17:32:37,086 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) [2022-02-20 17:32:37,095 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 [2022-02-20 17:32:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-20 17:32:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-02-20 17:32:37,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-20 17:32:37,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-20 17:32:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-20 17:32:37,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-20 17:32:37,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-20 17:32:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-20 17:32:37,176 INFO L234 CfgBuilder]: Building ICFG [2022-02-20 17:32:37,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-20 17:32:40,097 INFO L275 CfgBuilder]: Performing block encoding [2022-02-20 17:32:40,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-20 17:32:40,105 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-20 17:32:40,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:32:40 BoogieIcfgContainer [2022-02-20 17:32:40,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-20 17:32:40,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-20 17:32:40,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-20 17:32:40,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-20 17:32:40,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 05:32:36" (1/3) ... [2022-02-20 17:32:40,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc62d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:32:40, skipping insertion in model container [2022-02-20 17:32:40,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 05:32:37" (2/3) ... [2022-02-20 17:32:40,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc62d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 05:32:40, skipping insertion in model container [2022-02-20 17:32:40,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 05:32:40" (3/3) ... [2022-02-20 17:32:40,112 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_unwindbound1.i [2022-02-20 17:32:40,116 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-20 17:32:40,116 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-20 17:32:40,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-20 17:32:40,155 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-20 17:32:40,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-20 17:32:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 17:32:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-20 17:32:40,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:32:40,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:32:40,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:32:40,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:32:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1511169482, now seen corresponding path program 1 times [2022-02-20 17:32:40,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 17:32:40,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468526466] [2022-02-20 17:32:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:32:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 17:32:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 17:32:40,205 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) [2022-02-20 17:32:40,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-02-20 17:32:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:32:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-20 17:32:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-20 17:32:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-20 17:32:40,680 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#true} assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0bv32, 0bv32;assume 0bv1 == #valid[0bv32];assume ~bvult32(0bv32, #StackHeapBarrier);currentRoundingMode := ~roundNearestTiesToEven;call #Ultimate.allocInit(2bv32, 1bv32);call write~init~intINTTYPE1(48bv8, 1bv32, 0bv32, 1bv32);call write~init~intINTTYPE1(0bv8, 1bv32, 1bv32, 1bv32);call #Ultimate.allocInit(8bv32, 2bv32);~counter~0 := 0bv32; {32#true} is VALID [2022-02-20 17:32:40,681 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#true} assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~nondet3#1, main_#t~post4#1, main_~n~0#1, main_~a~0#1, main_~r~0#1, main_~k~0#1, main_~q~0#1, main_~d~0#1, main_~s~0#1, main_~t~0#1;havoc main_~n~0#1;havoc main_~a~0#1;havoc main_~r~0#1;havoc main_~k~0#1;havoc main_~q~0#1;havoc main_~d~0#1;havoc main_~s~0#1;havoc main_~t~0#1;main_~n~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1;main_~a~0#1 := main_#t~nondet3#1;havoc main_#t~nondet3#1; {32#true} is VALID [2022-02-20 17:32:40,681 INFO L272 TraceCheckUtils]: 2: Hoare triple {32#true} call assume_abort_if_not((if ~bvult32(main_~n~0#1, 536870911bv32) then 1bv32 else 0bv32)); {32#true} is VALID [2022-02-20 17:32:40,681 INFO L290 TraceCheckUtils]: 3: Hoare triple {32#true} ~cond := #in~cond; {32#true} is VALID [2022-02-20 17:32:40,682 INFO L290 TraceCheckUtils]: 4: Hoare triple {32#true} assume 0bv32 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:32:40,682 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:32:40,682 INFO L284 TraceCheckUtils]: 6: Hoare quadruple {33#false} {32#true} #68#return; {33#false} is VALID [2022-02-20 17:32:40,683 INFO L272 TraceCheckUtils]: 7: Hoare triple {33#false} call assume_abort_if_not((if ~bvugt32(main_~a~0#1, 2bv32) then 1bv32 else 0bv32)); {33#false} is VALID [2022-02-20 17:32:40,683 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#false} ~cond := #in~cond; {33#false} is VALID [2022-02-20 17:32:40,683 INFO L290 TraceCheckUtils]: 9: Hoare triple {33#false} assume 0bv32 == ~cond;assume false; {33#false} is VALID [2022-02-20 17:32:40,683 INFO L290 TraceCheckUtils]: 10: Hoare triple {33#false} assume true; {33#false} is VALID [2022-02-20 17:32:40,683 INFO L284 TraceCheckUtils]: 11: Hoare quadruple {33#false} {33#false} #70#return; {33#false} is VALID [2022-02-20 17:32:40,684 INFO L290 TraceCheckUtils]: 12: Hoare triple {33#false} main_~d~0#1 := main_~a~0#1;main_~r~0#1 := ~bvurem32(main_~n~0#1, main_~d~0#1);main_~t~0#1 := 0bv32;main_~k~0#1 := ~bvurem32(main_~n~0#1, ~bvsub32(main_~d~0#1, 2bv32));main_~q~0#1 := ~bvmul32(4bv32, ~bvsub32(~bvudiv32(main_~n~0#1, ~bvsub32(main_~d~0#1, 2bv32)), ~bvudiv32(main_~n~0#1, main_~d~0#1)));main_~s~0#1 := ~convertDOUBLEToUINT(~roundTowardZero, ~fp.sqrt~DOUBLE(currentRoundingMode, ~convertUINTToDOUBLE(currentRoundingMode, main_~n~0#1))); {33#false} is VALID [2022-02-20 17:32:40,684 INFO L290 TraceCheckUtils]: 13: Hoare triple {33#false} main_#t~post4#1 := ~counter~0;~counter~0 := ~bvadd32(1bv32, main_#t~post4#1); {33#false} is VALID [2022-02-20 17:32:40,684 INFO L290 TraceCheckUtils]: 14: Hoare triple {33#false} assume !!~bvslt32(main_#t~post4#1, 1bv32);havoc main_#t~post4#1; {33#false} is VALID [2022-02-20 17:32:40,684 INFO L272 TraceCheckUtils]: 15: Hoare triple {33#false} call __VERIFIER_assert((if ~bvadd32(~bvadd32(~bvsub32(~bvsub32(~bvmul32(~bvmul32(main_~d~0#1, main_~d~0#1), main_~q~0#1), ~bvmul32(~bvmul32(2bv32, main_~q~0#1), main_~d~0#1)), ~bvmul32(~bvmul32(4bv32, main_~r~0#1), main_~d~0#1)), ~bvmul32(~bvmul32(4bv32, main_~k~0#1), main_~d~0#1)), ~bvmul32(8bv32, main_~r~0#1)) == ~bvmul32(8bv32, main_~n~0#1) then 1bv32 else 0bv32)); {33#false} is VALID [2022-02-20 17:32:40,684 INFO L290 TraceCheckUtils]: 16: Hoare triple {33#false} ~cond := #in~cond; {33#false} is VALID [2022-02-20 17:32:40,685 INFO L290 TraceCheckUtils]: 17: Hoare triple {33#false} assume 0bv32 == ~cond; {33#false} is VALID [2022-02-20 17:32:40,685 INFO L290 TraceCheckUtils]: 18: Hoare triple {33#false} assume !false; {33#false} is VALID [2022-02-20 17:32:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-20 17:32:40,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-20 17:32:40,686 INFO L144 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-02-20 17:32:40,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468526466] [2022-02-20 17:32:40,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468526466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-20 17:32:40,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-20 17:32:40,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-20 17:32:40,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258067530] [2022-02-20 17:32:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-20 17:32:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-20 17:32:40,693 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-02-20 17:32:40,695 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 17:32:42,081 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:32:42,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-20 17:32:42,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-02-20 17:32:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-20 17:32:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:32:42,118 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 17:32:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:32:45,796 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-02-20 17:32:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-20 17:32:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-20 17:32:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-20 17:32:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 17:32:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2022-02-20 17:32:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 17:32:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2022-02-20 17:32:45,817 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 82 transitions. [2022-02-20 17:32:49,129 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 82 edges. 82 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-02-20 17:32:49,135 INFO L225 Difference]: With dead ends: 55 [2022-02-20 17:32:49,135 INFO L226 Difference]: Without dead ends: 25 [2022-02-20 17:32:49,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-20 17:32:49,140 INFO L933 BasicCegarLoop]: 37 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, 37 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 [2022-02-20 17:32:49,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-20 17:32:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-20 17:32:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-20 17:32:49,165 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-02-20 17:32:49,165 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 17:32:49,166 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 17:32:49,167 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 17:32:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:32:49,177 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-02-20 17:32:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:32:49,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:32:49,178 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:32:49,178 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 25 states. [2022-02-20 17:32:49,179 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 25 states. [2022-02-20 17:32:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-20 17:32:49,190 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-02-20 17:32:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:32:49,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-20 17:32:49,191 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-02-20 17:32:49,191 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-02-20 17:32:49,191 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-02-20 17:32:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-20 17:32:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-02-20 17:32:49,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2022-02-20 17:32:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-20 17:32:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-02-20 17:32:49,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-20 17:32:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-20 17:32:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-20 17:32:49,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-20 17:32:49,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-20 17:32:49,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-02-20 17:32:49,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-02-20 17:32:49,403 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-20 17:32:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-20 17:32:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1110907126, now seen corresponding path program 1 times [2022-02-20 17:32:49,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-02-20 17:32:49,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193854921] [2022-02-20 17:32:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-20 17:32:49,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-02-20 17:32:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-02-20 17:32:49,420 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) [2022-02-20 17:32:49,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process