./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound50.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_valuebound50.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 bb5ad63279572b10ccf828ab50fb4850c30a9bc769c3e514e6f9dd22eeb86526 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:15:06,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:15:06,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:15:06,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:15:06,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:15:06,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:15:06,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:15:06,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:15:06,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:15:06,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:15:06,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:15:06,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:15:06,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:15:06,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:15:06,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:15:06,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:15:06,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:15:06,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:15:06,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:15:06,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:15:06,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:15:06,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:15:06,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:15:06,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:15:06,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:15:06,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:15:06,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:15:06,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:15:06,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:15:06,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:15:06,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:15:06,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:15:06,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:15:06,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:15:06,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:15:06,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:15:06,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:15:06,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:15:06,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:15:06,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:15:06,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:15:06,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 13:15:06,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:15:06,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:15:06,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:15:06,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:15:06,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:15:06,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:15:06,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:15:06,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:15:06,289 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:15:06,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:15:06,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:15:06,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 13:15:06,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:15:06,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:15:06,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:15:06,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:15:06,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:15:06,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:15:06,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:15:06,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:15:06,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:15:06,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:15:06,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:15:06,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:15:06,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:15:06,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:15:06,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:15:06,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:15:06,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 13:15:06,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 13:15:06,294 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:15:06,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:15:06,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:15:06,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:15:06,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb5ad63279572b10ccf828ab50fb4850c30a9bc769c3e514e6f9dd22eeb86526 [2021-12-17 13:15:06,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:15:06,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:15:06,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:15:06,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:15:06,584 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:15:06,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound50.i [2021-12-17 13:15:06,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0088db7/033eb075d56540d2af2446a2a8f7bf4f/FLAG06dfe1fed [2021-12-17 13:15:07,075 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:15:07,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound50.i [2021-12-17 13:15:07,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0088db7/033eb075d56540d2af2446a2a8f7bf4f/FLAG06dfe1fed [2021-12-17 13:15:07,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0088db7/033eb075d56540d2af2446a2a8f7bf4f [2021-12-17 13:15:07,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:15:07,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:15:07,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:15:07,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:15:07,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:15:07,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:15:07" (1/1) ... [2021-12-17 13:15:07,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a1b4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:07, skipping insertion in model container [2021-12-17 13:15:07,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:15:07" (1/1) ... [2021-12-17 13:15:07,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:15:07,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:15:07,629 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_valuebound50.i[948,961] [2021-12-17 13:15:07,644 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 13:15:07,649 INFO L158 Benchmark]: Toolchain (without parser) took 156.92ms. Allocated memory is still 90.2MB. Free memory was 52.9MB in the beginning and 44.4MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 13:15:07,650 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 13:15:07,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.68ms. Allocated memory is still 90.2MB. Free memory was 52.8MB in the beginning and 44.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 13:15:07,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory is still 69.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 151.68ms. Allocated memory is still 90.2MB. Free memory was 52.8MB in the beginning and 44.4MB in the end (delta: 8.4MB). 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_valuebound50.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 bb5ad63279572b10ccf828ab50fb4850c30a9bc769c3e514e6f9dd22eeb86526 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:15:09,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:15:09,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:15:09,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:15:09,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:15:09,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:15:09,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:15:09,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:15:09,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:15:09,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:15:09,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:15:09,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:15:09,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:15:09,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:15:09,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:15:09,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:15:09,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:15:09,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:15:09,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:15:09,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:15:09,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:15:09,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:15:09,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:15:09,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:15:09,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:15:09,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:15:09,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:15:09,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:15:09,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:15:09,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:15:09,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:15:09,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:15:09,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:15:09,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:15:09,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:15:09,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:15:09,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:15:09,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:15:09,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:15:09,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:15:09,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:15:09,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 13:15:09,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:15:09,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:15:09,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:15:09,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:15:09,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:15:09,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:15:09,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:15:09,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:15:09,633 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:15:09,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:15:09,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:15:09,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:15:09,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:15:09,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:15:09,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:15:09,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:15:09,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 13:15:09,636 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 13:15:09,636 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 13:15:09,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:15:09,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:15:09,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:15:09,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:15:09,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:15:09,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:15:09,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:15:09,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:15:09,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:15:09,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:15:09,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:15:09,638 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 13:15:09,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 13:15:09,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:15:09,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:15:09,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:15:09,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:15:09,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 13:15:09,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb5ad63279572b10ccf828ab50fb4850c30a9bc769c3e514e6f9dd22eeb86526 [2021-12-17 13:15:09,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:15:09,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:15:09,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:15:09,990 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:15:09,990 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:15:09,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound50.i [2021-12-17 13:15:10,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919e313d4/89ac855fbcf34a6eb2b8b7976c7e7df7/FLAGef99d4cd5 [2021-12-17 13:15:10,548 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:15:10,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound50.i [2021-12-17 13:15:10,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919e313d4/89ac855fbcf34a6eb2b8b7976c7e7df7/FLAGef99d4cd5 [2021-12-17 13:15:10,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919e313d4/89ac855fbcf34a6eb2b8b7976c7e7df7 [2021-12-17 13:15:10,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:15:10,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:15:10,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:15:10,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:15:10,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:15:10,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:15:10" (1/1) ... [2021-12-17 13:15:10,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4683c617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:10, skipping insertion in model container [2021-12-17 13:15:10,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:15:10" (1/1) ... [2021-12-17 13:15:10,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:15:10,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:15:11,090 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_valuebound50.i[948,961] [2021-12-17 13:15:11,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:15:11,149 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 13:15:11,173 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_valuebound50.i[948,961] [2021-12-17 13:15:11,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:15:11,207 INFO L208 MainTranslator]: Completed translation [2021-12-17 13:15:11,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11 WrapperNode [2021-12-17 13:15:11,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 13:15:11,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 13:15:11,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 13:15:11,209 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 13:15:11,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,240 INFO L137 Inliner]: procedures = 18, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2021-12-17 13:15:11,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 13:15:11,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 13:15:11,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 13:15:11,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 13:15:11,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 13:15:11,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 13:15:11,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 13:15:11,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 13:15:11,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (1/1) ... [2021-12-17 13:15:11,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:15:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:15:11,319 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 13:15:11,338 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 13:15:11,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 13:15:11,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 13:15:11,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 13:15:11,366 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 13:15:11,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 13:15:11,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 13:15:11,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 13:15:11,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 13:15:11,429 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 13:15:11,431 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 13:15:14,477 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 13:15:14,484 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 13:15:14,484 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 13:15:14,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:15:14 BoogieIcfgContainer [2021-12-17 13:15:14,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 13:15:14,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 13:15:14,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 13:15:14,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 13:15:14,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:15:10" (1/3) ... [2021-12-17 13:15:14,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9526b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:15:14, skipping insertion in model container [2021-12-17 13:15:14,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:15:11" (2/3) ... [2021-12-17 13:15:14,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9526b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:15:14, skipping insertion in model container [2021-12-17 13:15:14,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:15:14" (3/3) ... [2021-12-17 13:15:14,514 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_valuebound50.i [2021-12-17 13:15:14,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 13:15:14,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 13:15:14,570 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 13:15:14,579 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 13:15:14,580 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 13:15:14,594 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 13:15:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 13:15:14,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:15:14,600 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 13:15:14,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:15:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:15:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash 919095715, now seen corresponding path program 1 times [2021-12-17 13:15:14,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:15:14,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380071608] [2021-12-17 13:15:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:15:14,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:15:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:15:14,623 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 13:15:14,630 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 13:15:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:15:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 13:15:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:15:15,474 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 13:15:15,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:15:15,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:15:15,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380071608] [2021-12-17 13:15:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380071608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:15:15,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:15:15,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 13:15:15,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528035523] [2021-12-17 13:15:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:15:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 13:15:15,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:15:15,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 13:15:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:15:15,506 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 13:15:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:15:15,537 INFO L93 Difference]: Finished difference Result 59 states and 92 transitions. [2021-12-17 13:15:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 13:15:15,541 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 13:15:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:15:15,549 INFO L225 Difference]: With dead ends: 59 [2021-12-17 13:15:15,550 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 13:15:15,553 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 13:15:15,559 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 13:15:15,561 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 13:15:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 13:15:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 13:15:15,600 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 13:15:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-12-17 13:15:15,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 29 [2021-12-17 13:15:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:15:15,606 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-12-17 13:15:15,606 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 13:15:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-12-17 13:15:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 13:15:15,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:15:15,609 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 13:15:15,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 13:15:15,809 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 13:15:15,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:15:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:15:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -960358297, now seen corresponding path program 1 times [2021-12-17 13:15:15,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:15:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288087590] [2021-12-17 13:15:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:15:15,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:15:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:15:15,814 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 13:15:15,816 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 13:15:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:15:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 13:15:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:18:35,793 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 (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ bv50 32)) (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| (_ bv50 32)))) is different from false [2021-12-17 13:18:37,817 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 (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| (_ bv50 32)) (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| (_ bv50 32)))) is different from true [2021-12-17 13:18:37,817 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 13:18:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:18:57,570 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 13:19:06,813 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 13:19:19,476 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 13:19:42,832 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 13:20:04,795 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| (_ bv50 32))) (not (bvugt |ULTIMATE.start_main_~a~0#1| (_ bv2 32))))) is different from true [2021-12-17 13:20:04,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:20:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288087590] [2021-12-17 13:20:04,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288087590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:20:04,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922508920] [2021-12-17 13:20:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:20:04,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 13:20:04,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 13:20:04,800 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 13:20:04,802 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 13:20:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:20:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 13:20:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:23:44,431 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 13:23:44,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:24:06,902 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 13:24:30,276 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 13:24:49,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1922508920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:24:49,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 13:24:49,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-17 13:24:49,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374610570] [2021-12-17 13:24:49,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 13:24:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 13:24:49,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:24:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 13:24:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=127, Unknown=18, NotChecked=232, Total=420 [2021-12-17 13:24:49,930 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 13:24:58,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:25:02,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:25:05,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-17 13:25:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:25:08,341 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2021-12-17 13:25:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 13:25:08,363 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 13:25:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:25:08,364 INFO L225 Difference]: With dead ends: 42 [2021-12-17 13:25:08,365 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 13:25:08,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=47, Invalid=147, Unknown=20, NotChecked=248, Total=462 [2021-12-17 13:25:08,366 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:25:08,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 1 Unknown, 74 Unchecked, 14.1s Time] [2021-12-17 13:25:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 13:25:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-12-17 13:25:08,373 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 13:25:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-12-17 13:25:08,374 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 29 [2021-12-17 13:25:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:25:08,375 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-12-17 13:25:08,375 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 13:25:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-12-17 13:25:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 13:25:08,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:25:08,376 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 13:25:08,392 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 13:25:08,630 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 13:25:08,788 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 13:25:08,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:25:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:25:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash -603494572, now seen corresponding path program 1 times [2021-12-17 13:25:08,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:25:08,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111037137] [2021-12-17 13:25:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:25:08,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:25:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:25:08,791 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 13:25:08,792 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 13:25:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:25:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 13:25:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:25:09,580 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 13:25:09,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:25:09,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 13:25:09,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111037137] [2021-12-17 13:25:09,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111037137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:25:09,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:25:09,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 13:25:09,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268088440] [2021-12-17 13:25:09,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:25:09,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 13:25:09,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 13:25:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 13:25:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 13:25:09,584 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 13:25:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:25:10,602 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-12-17 13:25:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 13:25:10,616 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 13:25:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:25:10,617 INFO L225 Difference]: With dead ends: 44 [2021-12-17 13:25:10,617 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 13:25:10,618 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 13:25:10,619 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 13:25:10,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 13:25:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 13:25:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-12-17 13:25:10,625 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 13:25:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-12-17 13:25:10,626 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 34 [2021-12-17 13:25:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:25:10,626 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-12-17 13:25:10,626 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 13:25:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-12-17 13:25:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 13:25:10,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:25:10,633 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 13:25:10,654 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 13:25:10,851 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 13:25:10,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:25:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:25:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -127108025, now seen corresponding path program 1 times [2021-12-17 13:25:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 13:25:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917490559] [2021-12-17 13:25:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:25:10,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 13:25:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 13:25:10,855 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 13:25:10,857 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 13:25:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:25:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 13:25:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15