./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:13:02,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:13:02,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:13:02,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:13:02,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:13:02,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:13:02,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:13:02,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:13:02,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:13:02,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:13:02,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:13:02,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:13:02,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:13:02,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:13:02,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:13:02,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:13:02,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:13:02,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:13:02,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:13:02,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:13:02,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:13:02,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:13:02,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:13:02,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:13:02,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:13:02,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:13:02,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:13:02,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:13:02,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:13:02,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:13:02,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:13:02,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:13:02,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:13:02,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:13:02,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:13:02,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:13:02,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:13:02,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:13:02,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:13:02,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:13:02,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:13:02,262 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:13:02,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:13:02,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:13:02,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:13:02,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:13:02,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:13:02,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:13:02,288 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:13:02,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:13:02,288 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:13:02,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:13:02,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:13:02,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:13:02,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:13:02,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:13:02,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:13:02,290 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:13:02,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:13:02,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:13:02,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:13:02,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:13:02,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:13:02,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:13:02,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:13:02,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:13:02,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:13:02,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:13:02,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:13:02,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:13:02,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:13:02,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:13:02,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:13:02,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:13:02,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:13:02,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:13:02,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:13:02,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:13:02,296 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:13:02,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:13:02,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:13:02,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:13:02,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:13:02,297 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b [2021-11-25 19:13:02,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:13:02,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:13:02,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:13:02,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:13:02,564 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:13:02,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2021-11-25 19:13:02,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/73deab1c3/a3201ae891594fbbbfed0c041e09751c/FLAG5915e2eae [2021-11-25 19:13:03,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:13:03,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2021-11-25 19:13:03,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/73deab1c3/a3201ae891594fbbbfed0c041e09751c/FLAG5915e2eae [2021-11-25 19:13:03,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/73deab1c3/a3201ae891594fbbbfed0c041e09751c [2021-11-25 19:13:03,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:13:03,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:13:03,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:13:03,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:13:03,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:13:03,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:03" (1/1) ... [2021-11-25 19:13:03,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bf083dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:03, skipping insertion in model container [2021-11-25 19:13:03,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:03" (1/1) ... [2021-11-25 19:13:03,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:13:03,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:13:03,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i[948,961] [2021-11-25 19:13:03,714 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) [2021-11-25 19:13:03,719 INFO L158 Benchmark]: Toolchain (without parser) took 230.49ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 54.9MB in the beginning and 87.8MB in the end (delta: -32.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:13:03,720 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 62.7MB in the beginning and 62.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:13:03,721 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.98ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 54.7MB in the beginning and 87.8MB in the end (delta: -33.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:13:03,723 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 was 62.7MB in the beginning and 62.7MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.98ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 54.7MB in the beginning and 87.8MB in the end (delta: -33.1MB). 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=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:13:05,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:13:05,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:13:05,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:13:05,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:13:05,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:13:05,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:13:05,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:13:05,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:13:05,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:13:05,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:13:05,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:13:05,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:13:05,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:13:06,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:13:06,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:13:06,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:13:06,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:13:06,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:13:06,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:13:06,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:13:06,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:13:06,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:13:06,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:13:06,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:13:06,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:13:06,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:13:06,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:13:06,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:13:06,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:13:06,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:13:06,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:13:06,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:13:06,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:13:06,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:13:06,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:13:06,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:13:06,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:13:06,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:13:06,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:13:06,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:13:06,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:13:06,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:13:06,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:13:06,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:13:06,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:13:06,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:13:06,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:13:06,085 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:13:06,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:13:06,086 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:13:06,086 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:13:06,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:13:06,086 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:13:06,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:13:06,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:13:06,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:13:06,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:13:06,088 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:13:06,089 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:13:06,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:13:06,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:13:06,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:13:06,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:13:06,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:13:06,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:13:06,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:13:06,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:13:06,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:13:06,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:13:06,092 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8666e561276f52fdb57f95324433fec798c5d47b9bb4ca4cdc06eae6ff06b [2021-11-25 19:13:06,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:13:06,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:13:06,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:13:06,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:13:06,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:13:06,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2021-11-25 19:13:06,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/1952e054c/6e7dd4552e6c4920913bea4c24a0b6db/FLAGf684be99b [2021-11-25 19:13:07,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:13:07,065 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i [2021-11-25 19:13:07,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/1952e054c/6e7dd4552e6c4920913bea4c24a0b6db/FLAGf684be99b [2021-11-25 19:13:07,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/data/1952e054c/6e7dd4552e6c4920913bea4c24a0b6db [2021-11-25 19:13:07,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:13:07,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:13:07,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:13:07,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:13:07,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:13:07,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4634c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07, skipping insertion in model container [2021-11-25 19:13:07,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:13:07,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:13:07,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i[948,961] [2021-11-25 19:13:07,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:13:07,664 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:13:07,700 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/sv-benchmarks/c/nla-digbench-scaling/knuth_valuebound20.i[948,961] [2021-11-25 19:13:07,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:13:07,757 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:13:07,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07 WrapperNode [2021-11-25 19:13:07,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:13:07,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:13:07,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:13:07,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:13:07,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,797 INFO L137 Inliner]: procedures = 18, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2021-11-25 19:13:07,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:13:07,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:13:07,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:13:07,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:13:07,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:13:07,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:13:07,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:13:07,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:13:07,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (1/1) ... [2021-11-25 19:13:07,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:13:07,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:07,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:13:07,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:13:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:13:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:13:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:13:07,904 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:13:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:13:07,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:13:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:13:07,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:13:07,968 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:13:07,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:13:10,846 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:13:10,853 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:13:10,853 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:13:10,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:13:10 BoogieIcfgContainer [2021-11-25 19:13:10,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:13:10,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:13:10,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:13:10,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:13:10,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:13:07" (1/3) ... [2021-11-25 19:13:10,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d4342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:13:10, skipping insertion in model container [2021-11-25 19:13:10,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:13:07" (2/3) ... [2021-11-25 19:13:10,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4d4342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:13:10, skipping insertion in model container [2021-11-25 19:13:10,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:13:10" (3/3) ... [2021-11-25 19:13:10,880 INFO L111 eAbstractionObserver]: Analyzing ICFG knuth_valuebound20.i [2021-11-25 19:13:10,885 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:13:10,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:13:10,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:13:11,004 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=FINITE_AUTOMATA, 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 [2021-11-25 19:13:11,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:13:11,033 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) [2021-11-25 19:13:11,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:13:11,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:11,041 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] [2021-11-25 19:13:11,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash 919095715, now seen corresponding path program 1 times [2021-11-25 19:13:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170070319] [2021-11-25 19:13:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:11,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:11,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:13:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 19:13:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:13:11,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:13:11,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:13:11,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170070319] [2021-11-25 19:13:11,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170070319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:13:11,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:13:11,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:13:11,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621542187] [2021-11-25 19:13:11,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:13:11,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:13:11,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:13:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:13:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:13:11,764 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) [2021-11-25 19:13:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:11,786 INFO L93 Difference]: Finished difference Result 59 states and 92 transitions. [2021-11-25 19:13:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:13:11,788 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 [2021-11-25 19:13:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:11,795 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:13:11,796 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:13:11,799 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 [2021-11-25 19:13:11,802 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 [2021-11-25 19:13:11,804 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] [2021-11-25 19:13:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:13:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-25 19:13:11,839 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) [2021-11-25 19:13:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-11-25 19:13:11,842 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 29 [2021-11-25 19:13:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:11,842 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-11-25 19:13:11,842 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) [2021-11-25 19:13:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-11-25 19:13:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:13:11,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:11,846 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] [2021-11-25 19:13:11,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:12,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:13:12,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash -960358297, now seen corresponding path program 1 times [2021-11-25 19:13:12,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:13:12,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548933228] [2021-11-25 19:13:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:12,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:13:12,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:13:12,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:13:12,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:13:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:13:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:58,250 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 19:13:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:13:58,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:14:07,867 WARN L860 $PredicateComparison]: unable to prove that (= (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse1 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (.cse3 (bvurem |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (.cse0 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse2))) (bvadd (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse1 (_ bv8 32))) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse2) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse3) (bvmul (_ bv4 32) (bvmul .cse1 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse0 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|)) is different from true [2021-11-25 19:14:16,785 WARN L860 $PredicateComparison]: unable to prove that (or (not (bvugt |c_ULTIMATE.start_main_~a~0#1| (_ bv2 32))) (= (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse1 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|))) (.cse3 (bvurem |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (.cse0 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse2))) (bvadd (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse1 (_ bv8 32))) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse2) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse3) (bvmul (_ bv4 32) (bvmul .cse1 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse0 |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|))) is different from true [2021-11-25 19:14:29,247 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (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 (= (let ((.cse1 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv4294967294 32)))) (let ((.cse0 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (.cse3 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (.cse2 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse1))) (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 (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse1) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvadd (bvmul .cse2 (_ bv8 32)) (bvmul .cse0 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv8 32) .cse3) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|)) (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv2 32))))) is different from true [2021-11-25 19:14:52,438 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (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 (= (let ((.cse1 (bvadd |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv4294967294 32)))) (let ((.cse0 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))) (.cse3 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (.cse2 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse1))) (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 (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| .cse1) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvneg (bvmul (bvadd (bvmul .cse2 (_ bv8 32)) (bvmul .cse0 (_ bv8 32))) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv8 32) .cse3) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|)) (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_3| (_ bv2 32)))) (= c_assume_abort_if_not_~cond (_ bv0 32))) is different from true [2021-11-25 19:15:13,818 WARN L860 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1| (_ BitVec 32))) (or (not (bvugt |ULTIMATE.start_main_~a~0#1| (_ bv2 32))) (= (let ((.cse2 (bvadd |ULTIMATE.start_main_~a~0#1| (_ bv4294967294 32)))) (let ((.cse1 (bvneg (bvudiv |c_ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|))) (.cse3 (bvurem |c_ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse0 (bvudiv |c_ULTIMATE.start_main_~n~0#1| .cse2))) (bvadd (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse1 (_ bv8 32))) |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul (bvurem |c_ULTIMATE.start_main_~n~0#1| .cse2) |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv8 32) .cse3) (bvmul (_ bv4 32) (bvmul .cse1 |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|)) (bvneg (bvmul (bvmul .cse3 (_ bv4 32)) |ULTIMATE.start_main_~a~0#1|)) (bvmul (_ bv4 32) (bvmul .cse0 |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|))))) (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~n~0#1|)) (not (bvule |ULTIMATE.start_main_~a~0#1| (_ bv20 32))))) is different from true [2021-11-25 19:15:13,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:15:13,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548933228] [2021-11-25 19:15:13,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548933228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815305933] [2021-11-25 19:15:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:13,820 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:15:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:15:13,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:15:13,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-25 19:15:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:15:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:18:02,516 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-25 19:18:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:18:04,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:18:26,911 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (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 (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv2 32)) (= (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|) (let ((.cse3 (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| .cse3)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (.cse0 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (bvadd (bvmul (_ bv8 32) .cse0) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |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|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse3) |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|)) (bvneg (bvmul (bvmul .cse0 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))))))))) is different from true [2021-11-25 19:18:50,075 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c_assume_abort_if_not_#in~cond| (_ bv0 32))) (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 (bvugt |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7| (_ bv2 32)) (= (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11|) (let ((.cse3 (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| .cse3)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (.cse0 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|))) (bvadd (bvmul (_ bv8 32) .cse0) (bvneg (bvmul (bvadd (bvmul .cse1 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |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|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_11| .cse3) |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|)) (bvneg (bvmul (bvmul .cse0 (_ bv4 32)) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_7|)))))))) (= c_assume_abort_if_not_~cond (_ bv0 32))) is different from true [2021-11-25 19:19:09,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815305933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:19:09,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890621352] [2021-11-25 19:19:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:19:09,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:19:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:19:09,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:19:09,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:19:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:19:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:19:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:22:44,441 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| (_ BitVec 32))) (and (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| (_ bv20 32)) (not (= (let ((.cse3 (bvadd (_ bv4294967294 32) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|))) (let ((.cse0 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| .cse3)) (.cse1 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv8 32) .cse1) (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| .cse3) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10|))) (bvule |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| (_ bv20 32)))) is different from false [2021-11-25 19:22:46,470 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| (_ BitVec 32))) (and (bvule |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| (_ bv20 32)) (not (= (let ((.cse3 (bvadd (_ bv4294967294 32) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|))) (let ((.cse0 (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| .cse3)) (.cse1 (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (.cse2 (bvneg (bvudiv |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)))) (bvadd (bvmul (_ bv4 32) (bvmul .cse0 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv8 32) .cse1) (bvneg (bvmul (bvadd (bvmul .cse0 (_ bv8 32)) (bvmul .cse2 (_ bv8 32))) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvneg (bvmul (bvmul .cse1 (_ bv4 32)) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv4 32) (bvmul .cse2 |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|)) (bvmul (_ bv4 32) (bvmul (bvurem |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10| .cse3) |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2|))))) (bvmul (_ bv8 32) |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_10|))) (bvule |v_ULTIMATE.start_main_~d~0#1_BEFORE_CALL_2| (_ bv20 32)))) is different from true [2021-11-25 19:22:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:22:46,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:22:46,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890621352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:22:46,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:22:46,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 10] total 13 [2021-11-25 19:22:46,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657301435] [2021-11-25 19:22:46,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:22:46,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:22:46,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:22:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:22:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=169, Unknown=21, NotChecked=264, Total=506 [2021-11-25 19:22:46,477 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:22:54,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:22:57,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:22:59,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:23:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:03,500 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2021-11-25 19:23:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:23:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-11-25 19:23:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:03,525 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:23:03,525 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 19:23:03,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=56, Invalid=193, Unknown=23, NotChecked=280, Total=552 [2021-11-25 19:23:03,528 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:03,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 1 Unknown, 73 Unchecked, 12.7s Time] [2021-11-25 19:23:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 19:23:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-11-25 19:23:03,541 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) [2021-11-25 19:23:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-25 19:23:03,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 29 [2021-11-25 19:23:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:03,544 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-25 19:23:03,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:23:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-25 19:23:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:23:03,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:03,546 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] [2021-11-25 19:23:03,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:23:03,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-25 19:23:04,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 19:23:04,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:04,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -603494572, now seen corresponding path program 1 times [2021-11-25 19:23:04,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:23:04,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017103637] [2021-11-25 19:23:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:04,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:23:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:23:04,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:23:04,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:23:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:23:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:23:04,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:23:04,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:23:04,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017103637] [2021-11-25 19:23:04,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017103637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:04,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:04,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:23:04,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772312099] [2021-11-25 19:23:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:23:04,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:23:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:23:04,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:23:04,969 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) [2021-11-25 19:23:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:05,727 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-11-25 19:23:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:23:05,735 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 [2021-11-25 19:23:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:05,737 INFO L225 Difference]: With dead ends: 44 [2021-11-25 19:23:05,737 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 19:23:05,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:23:05,740 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:05,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:23:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 19:23:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-11-25 19:23:05,751 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) [2021-11-25 19:23:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-25 19:23:05,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 34 [2021-11-25 19:23:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:05,754 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-25 19:23:05,754 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) [2021-11-25 19:23:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-25 19:23:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:23:05,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:05,757 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] [2021-11-25 19:23:05,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:23:05,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:23:05,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash -127108025, now seen corresponding path program 1 times [2021-11-25 19:23:05,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:23:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075915303] [2021-11-25 19:23:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:05,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:23:05,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:23:05,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:23:05,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9e820d5-37ce-4f6e-8246-978ce4805fdf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:23:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:23:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates...