./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.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 725f145f29173a8eb9d341d6c4f743ec9526dd2a9ceaf2d591ceb6d76764d49f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:08:31,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:08:31,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:08:31,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:08:31,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:08:31,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:08:31,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:08:31,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:08:31,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:08:31,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:08:31,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:08:31,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:08:31,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:08:31,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:08:31,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:08:31,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:08:31,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:08:31,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:08:31,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:08:31,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:08:31,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:08:31,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:08:31,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:08:31,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:08:31,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:08:31,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:08:31,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:08:31,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:08:31,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:08:31,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:08:31,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:08:31,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:08:31,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:08:31,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:08:31,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:08:31,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:08:31,548 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:08:31,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:08:31,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:08:31,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:08:31,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:08:31,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 13:08:31,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:08:31,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:08:31,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:08:31,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:08:31,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:08:31,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:08:31,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:08:31,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:08:31,575 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:08:31,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:08:31,576 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:08:31,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 13:08:31,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:08:31,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:08:31,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:08:31,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:08:31,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:08:31,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:08:31,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:08:31,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:08:31,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:08:31,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:08:31,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:08:31,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:08:31,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 725f145f29173a8eb9d341d6c4f743ec9526dd2a9ceaf2d591ceb6d76764d49f [2021-12-17 13:08:31,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:08:31,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:08:31,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:08:31,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:08:31,788 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:08:31,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.i [2021-12-17 13:08:31,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f80f1cd/898aae864d044397828df5ae30f901a3/FLAG1e37fd99f [2021-12-17 13:08:32,205 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:08:32,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.i [2021-12-17 13:08:32,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f80f1cd/898aae864d044397828df5ae30f901a3/FLAG1e37fd99f [2021-12-17 13:08:32,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f80f1cd/898aae864d044397828df5ae30f901a3 [2021-12-17 13:08:32,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:08:32,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:08:32,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:08:32,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:08:32,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:08:32,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:32" (1/1) ... [2021-12-17 13:08:32,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e1abfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:32, skipping insertion in model container [2021-12-17 13:08:32,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:32" (1/1) ... [2021-12-17 13:08:32,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:08:32,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:08:32,403 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_valuebound100.i[948,961] [2021-12-17 13:08:32,414 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:846) 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:1434) 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:730) 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:1385) 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:1069) 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:1456) 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:3268) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2342) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:595) 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) [2021-12-17 13:08:32,419 INFO L158 Benchmark]: Toolchain (without parser) took 188.22ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 77.0MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 13:08:32,420 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 13:08:32,422 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.29ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 77.0MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 13:08:32,424 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 98.6MB. Free memory was 55.0MB in the beginning and 54.9MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.29ms. Allocated memory is still 98.6MB. Free memory was 68.8MB in the beginning and 77.0MB in the end (delta: -8.2MB). 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:846) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.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 725f145f29173a8eb9d341d6c4f743ec9526dd2a9ceaf2d591ceb6d76764d49f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:08:33,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:08:33,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:08:33,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:08:33,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:08:33,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:08:33,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:08:33,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:08:33,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:08:33,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:08:33,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:08:33,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:08:33,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:08:33,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:08:33,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:08:33,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:08:33,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:08:33,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:08:33,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:08:33,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:08:33,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:08:33,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:08:33,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:08:33,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:08:33,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:08:33,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:08:33,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:08:33,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:08:33,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:08:33,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:08:33,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:08:33,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:08:33,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:08:33,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:08:33,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:08:33,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:08:33,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:08:33,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:08:33,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:08:33,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:08:33,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:08:33,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 13:08:33,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:08:33,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:08:33,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:08:33,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:08:33,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:08:33,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:08:33,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:08:33,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:08:33,959 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:08:33,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:08:33,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:08:33,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:08:33,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:08:33,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:08:33,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:08:33,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:08:33,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:08:33,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:08:33,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:08:33,963 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 13:08:33,963 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 13:08:33,963 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:08:33,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:08:33,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:08:33,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:08:33,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 13:08:33,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 725f145f29173a8eb9d341d6c4f743ec9526dd2a9ceaf2d591ceb6d76764d49f [2021-12-17 13:08:34,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:08:34,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:08:34,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:08:34,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:08:34,224 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:08:34,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.i [2021-12-17 13:08:34,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe68778d/48912d96f68140c5a210e19475cce90c/FLAG727fc86e7 [2021-12-17 13:08:34,638 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:08:34,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound100.i [2021-12-17 13:08:34,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe68778d/48912d96f68140c5a210e19475cce90c/FLAG727fc86e7 [2021-12-17 13:08:34,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe68778d/48912d96f68140c5a210e19475cce90c [2021-12-17 13:08:34,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:08:34,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:08:34,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:08:34,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:08:34,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:08:34,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74fc916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34, skipping insertion in model container [2021-12-17 13:08:34,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:08:34,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:08:34,785 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_valuebound100.i[948,961] [2021-12-17 13:08:34,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:08:34,848 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 13:08:34,878 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_valuebound100.i[948,961] [2021-12-17 13:08:34,892 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:08:34,901 INFO L208 MainTranslator]: Completed translation [2021-12-17 13:08:34,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34 WrapperNode [2021-12-17 13:08:34,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 13:08:34,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 13:08:34,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 13:08:34,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 13:08:34,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,953 INFO L137 Inliner]: procedures = 18, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2021-12-17 13:08:34,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 13:08:34,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 13:08:34,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 13:08:34,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 13:08:34,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:34,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 13:08:34,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 13:08:34,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 13:08:34,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 13:08:34,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (1/1) ... [2021-12-17 13:08:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:08:35,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:08:35,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 13:08:35,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 13:08:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 13:08:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 13:08:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 13:08:35,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 13:08:35,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 13:08:35,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 13:08:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 13:08:35,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 13:08:35,109 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 13:08:35,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 13:08:37,954 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 13:08:37,958 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 13:08:37,959 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 13:08:37,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:08:37 BoogieIcfgContainer [2021-12-17 13:08:37,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 13:08:37,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 13:08:37,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 13:08:37,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 13:08:37,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:08:34" (1/3) ... [2021-12-17 13:08:37,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b03b983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:08:37, skipping insertion in model container [2021-12-17 13:08:37,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:08:34" (2/3) ... [2021-12-17 13:08:37,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b03b983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:08:37, skipping insertion in model container [2021-12-17 13:08:37,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:08:37" (3/3) ... [2021-12-17 13:08:37,965 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_valuebound100.i [2021-12-17 13:08:37,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 13:08:37,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 13:08:38,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 13:08:38,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 13:08:38,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 13:08:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:08:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 13:08:38,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:08:38,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:08:38,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:08:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:08:38,027 INFO L85 PathProgramCache]: Analyzing trace with hash 919095715, now seen corresponding path program 1 times [2021-12-17 13:08:38,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:08:38,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830142653] [2021-12-17 13:08:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:08:38,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:08:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:08:38,037 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) [2021-12-17 13:08:38,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 13:08:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:08:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 13:08:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:08:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 13:08:38,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:08:38,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:08:38,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830142653] [2021-12-17 13:08:38,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830142653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:08:38,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:08:38,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 13:08:38,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140191485] [2021-12-17 13:08:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:08:38,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 13:08:38,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:08:38,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 13:08:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:08:38,705 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 13:08:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:08:38,718 INFO L93 Difference]: Finished difference Result 59 states and 92 transitions. [2021-12-17 13:08:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 13:08:38,722 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-17 13:08:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:08:38,727 INFO L225 Difference]: With dead ends: 59 [2021-12-17 13:08:38,727 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 13:08:38,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:08:38,731 INFO L933 BasicCegarLoop]: 40 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, 40 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 [2021-12-17 13:08:38,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:08:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 13:08:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 13:08:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:08:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-12-17 13:08:38,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 29 [2021-12-17 13:08:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:08:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-12-17 13:08:38,755 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 13:08:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-12-17 13:08:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 13:08:38,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:08:38,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:08:38,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 13:08:38,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 13:08:38,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:08:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:08:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash -960358297, now seen corresponding path program 1 times [2021-12-17 13:08:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:08:38,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366993751] [2021-12-17 13:08:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:08:38,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:08:38,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:08:38,975 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) [2021-12-17 13:08:38,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 13:09:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:09:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 13:09:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:12:35,570 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ BitVec 32))) (and (not (= (let ((.cse2 (bvadd |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ bv4294967294 32)))) (let ((.cse0 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (.cse1 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|))) (.cse3 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| .cse2))) (bvadd (bvneg (bvmul (bvmul .cse0 (_ bv4 32)) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul .cse1 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| .cse2) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul .cse3 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv8 32) .cse0) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse3 (_ bv8 32))) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|))) (bvule |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ bv100 32)) (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ bv100 32)))) is different from false [2021-12-17 13:12:37,594 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ BitVec 32)) (|v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ BitVec 32))) (and (not (= (let ((.cse2 (bvadd |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ bv4294967294 32)))) (let ((.cse0 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (.cse1 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|))) (.cse3 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| .cse2))) (bvadd (bvneg (bvmul (bvmul .cse0 (_ bv4 32)) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul .cse1 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| .cse2) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv4 32) (bvmul .cse3 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|)) (bvmul (_ bv8 32) .cse0) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse3 (_ bv8 32))) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|))) (bvule |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_1| (_ bv100 32)) (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ bv100 32)))) is different from true [2021-12-17 13:12:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 13:12:37,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:12:59,033 WARN L860 $PredicateComparison]: unable to prove that (= (let ((.cse3 (bvadd |c_ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse0 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (.cse2 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse3)) (.cse1 (bvurem |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse1) (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse2 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse3) |c_ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|)) is different from true [2021-12-17 13:13:08,072 WARN L860 $PredicateComparison]: unable to prove that (or (= (let ((.cse3 (bvadd |c_ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse0 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (.cse2 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse3)) (.cse1 (bvurem |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse1) (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse2 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse3) |c_ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|)) (not (bvugt |c_ULTIMATE.start_main_~a~0#1| (_ bv2 32)))) is different from true [2021-12-17 13:13:20,945 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ BitVec 32))) (or (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv2 32)) (= (let ((.cse2 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv4294967294 32)))) (let ((.cse3 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse2)) (.cse0 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (.cse1 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv8 32) .cse1) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse2) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv4 32) (bvmul .cse3 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvadd (bvmul .cse3 (_ bv8 32)) (bvmul .cse0 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|)))) (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32)))) is different from true [2021-12-17 13:13:44,410 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ BitVec 32))) (or (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv2 32)) (= (let ((.cse2 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv4294967294 32)))) (let ((.cse3 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse2)) (.cse0 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (.cse1 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv8 32) .cse1) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse2) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv4 32) (bvmul .cse3 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvadd (bvmul .cse3 (_ bv8 32)) (bvmul .cse0 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|)))) (= (_ bv0 32) c_assume_abort_if_not_~cond) (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32)))) is different from true [2021-12-17 13:14:06,389 WARN L860 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1| (_ BitVec 32))) (or (= (let ((.cse3 (bvadd |ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse0 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|))) (.cse2 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse3)) (.cse1 (bvurem |c_ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse1) (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse2 |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse3) |ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|)) (not (bvule |ULTIMATE.start_main_~a~0#1| (_ bv100 32))) (not (bvugt |ULTIMATE.start_main_~a~0#1| (_ bv2 32))))) is different from true [2021-12-17 13:14:06,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:14:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366993751] [2021-12-17 13:14:06,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366993751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:14:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781128676] [2021-12-17 13:14:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:14:06,391 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 13:14:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 13:14:06,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 13:14:06,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-12-17 13:15:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:15:56,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 13:15:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:18:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 13:18:58,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:19:21,036 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ BitVec 32))) (or (= (let ((.cse0 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv4294967294 32)))) (let ((.cse1 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse0)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (.cse3 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (bvadd (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse0) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv4 32) (bvmul .cse1 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv8 32) .cse3)))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|)) (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv2 32)))) (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32)))) is different from true [2021-12-17 13:19:44,206 WARN L860 $PredicateComparison]: unable to prove that (or (= (_ bv0 32) c_assume_abort_if_not_~cond) (forall ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ BitVec 32))) (or (= (let ((.cse0 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv4294967294 32)))) (let ((.cse1 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse0)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (.cse3 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (bvadd (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse0) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv4 32) (bvmul .cse1 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)) (bvmul (_ bv8 32) .cse3)))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|)) (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv2 32)))) (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32)))) is different from true [2021-12-17 13:20:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1781128676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:20:03,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 13:20:03,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-17 13:20:03,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957151889] [2021-12-17 13:20:03,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 13:20:03,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 13:20:03,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:20:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 13:20:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=126, Unknown=19, NotChecked=232, Total=420 [2021-12-17 13:20:03,955 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 13:20:12,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:20:15,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:20:18,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:20:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:20:20,993 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2021-12-17 13:20:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 13:20:21,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-17 13:20:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:20:21,012 INFO L225 Difference]: With dead ends: 42 [2021-12-17 13:20:21,012 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 13:20:21,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=47, Invalid=146, Unknown=21, NotChecked=248, Total=462 [2021-12-17 13:20:21,013 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-12-17 13:20:21,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 2 Unknown, 74 Unchecked, 12.7s Time] [2021-12-17 13:20:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 13:20:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-12-17 13:20:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 13:20:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-12-17 13:20:21,029 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 29 [2021-12-17 13:20:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:20:21,029 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-12-17 13:20:21,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 13:20:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-12-17 13:20:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 13:20:21,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:20:21,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:20:21,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 13:20:21,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-12-17 13:20:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 13:20:21,432 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:20:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:20:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -603494572, now seen corresponding path program 1 times [2021-12-17 13:20:21,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:20:21,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288124472] [2021-12-17 13:20:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:20:21,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:20:21,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:20:21,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 13:20:21,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 13:20:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:20:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 13:20:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:20:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 13:20:22,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:20:22,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:20:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288124472] [2021-12-17 13:20:22,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288124472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:20:22,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:20:22,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 13:20:22,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621443705] [2021-12-17 13:20:22,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:20:22,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 13:20:22,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:20:22,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 13:20:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 13:20:22,176 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 13:20:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:20:23,052 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-12-17 13:20:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 13:20:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-17 13:20:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:20:23,061 INFO L225 Difference]: With dead ends: 44 [2021-12-17 13:20:23,061 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 13:20:23,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 13:20:23,062 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 13:20:23,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 13:20:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 13:20:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-17 13:20:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:20:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-12-17 13:20:23,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 34 [2021-12-17 13:20:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:20:23,074 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-12-17 13:20:23,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 13:20:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-12-17 13:20:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 13:20:23,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:20:23,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:20:23,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 13:20:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 13:20:23,287 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:20:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:20:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -127108025, now seen corresponding path program 1 times [2021-12-17 13:20:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:20:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504719891] [2021-12-17 13:20:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:20:23,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:20:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:20:23,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 13:20:23,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 13:20:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:20:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 13:20:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15