./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3218f6ce73718f4714eadf36a1447f6463508e41642c256f71b5032b295cfea0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:18:44,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:18:44,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:18:44,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:18:44,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:18:44,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:18:44,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:18:44,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:18:44,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:18:44,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:18:44,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:18:44,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:18:44,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:18:44,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:18:44,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:18:44,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:18:44,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:18:44,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:18:44,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:18:44,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:18:44,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:18:44,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:18:44,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:18:44,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:18:44,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:18:44,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:18:44,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:18:44,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:18:44,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:18:44,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:18:44,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:18:44,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:18:44,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:18:44,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:18:44,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:18:44,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:18:44,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:18:44,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:18:44,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:18:44,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:18:44,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:18:44,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 12:18:44,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:18:44,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:18:44,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:18:44,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:18:44,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:18:44,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:18:44,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:18:44,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:18:44,826 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:18:44,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:18:44,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:18:44,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:18:44,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:18:44,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:18:44,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:18:44,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:18:44,829 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:18:44,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:18:44,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:18:44,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:18:44,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:18:44,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:18:44,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:18:44,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:18:44,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:18:44,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:18:44,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:18:44,831 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:18:44,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:18:44,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:18:44,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3218f6ce73718f4714eadf36a1447f6463508e41642c256f71b5032b295cfea0 [2022-11-20 12:18:45,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:18:45,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:18:45,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:18:45,230 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:18:45,230 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:18:45,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c [2022-11-20 12:18:48,613 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:18:49,148 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:18:49,148 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c [2022-11-20 12:18:49,178 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/8eb3d3372/4ee3636db64a4f948989310ed8f79a3c/FLAG03c2989e5 [2022-11-20 12:18:49,200 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/8eb3d3372/4ee3636db64a4f948989310ed8f79a3c [2022-11-20 12:18:49,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:18:49,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:18:49,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:18:49,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:18:49,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:18:49,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:49" (1/1) ... [2022-11-20 12:18:49,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e06af03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:49, skipping insertion in model container [2022-11-20 12:18:49,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:49" (1/1) ... [2022-11-20 12:18:49,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:18:49,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:18:49,586 WARN L237 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_dd78f90e-05cf-4852-8a06-4e52586c22e7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c[1014,1027] [2022-11-20 12:18:49,765 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.BitabsTranslation.abstractShiftRight(BitabsTranslation.java:159) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.IntegerTranslation.constructBinaryBitwiseIntegerExpression(IntegerTranslation.java:190) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.expressiontranslation.ExpressionTranslation.constructBinaryBitwiseExpression(ExpressionTranslation.java:131) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CExpressionTranslator.handleBitshiftOperation(CExpressionTranslator.java:418) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:834) 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:2446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:728) 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:2446) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:303) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1126) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:276) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:728) 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:1413) 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:1087) 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.handleLoops(CHandler.java:3466) 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:223) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:1087) 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:1489) 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:3314) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:2388) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.CHandler.visit(CHandler.java:600) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.PRDispatcher.dispatch(PRDispatcher.java:134) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.translate(MainTranslator.java:192) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.run(MainTranslator.java:115) at de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.MainTranslator.(MainTranslator.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver.finish(CACSL2BoogieTranslatorObserver.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 12:18:49,770 INFO L158 Benchmark]: Toolchain (without parser) took 561.82ms. Allocated memory is still 172.0MB. Free memory was 123.1MB in the beginning and 94.4MB in the end (delta: 28.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-20 12:18:49,771 INFO L158 Benchmark]: CDTParser took 0.64ms. Allocated memory is still 113.2MB. Free memory was 62.4MB in the beginning and 62.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:18:49,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 554.54ms. Allocated memory is still 172.0MB. Free memory was 122.6MB in the beginning and 94.4MB in the end (delta: 28.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-20 12:18:49,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64ms. Allocated memory is still 113.2MB. Free memory was 62.4MB in the beginning and 62.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 554.54ms. Allocated memory is still 172.0MB. Free memory was 122.6MB in the beginning and 94.4MB in the end (delta: 28.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: NullPointerException: null: de.uni_freiburg.informatik.ultimate.cdt.translation.implementation.base.chandler.TypeSizes.extractIntegerValue(TypeSizes.java:384) 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3218f6ce73718f4714eadf36a1447f6463508e41642c256f71b5032b295cfea0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:18:52,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:18:52,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:18:52,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:18:52,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:18:52,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:18:52,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:18:52,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:18:52,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:18:52,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:18:52,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:18:52,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:18:52,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:18:52,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:18:52,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:18:52,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:18:52,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:18:52,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:18:52,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:18:52,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:18:52,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:18:52,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:18:52,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:18:52,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:18:52,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:18:52,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:18:52,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:18:52,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:18:52,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:18:52,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:18:52,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:18:52,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:18:52,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:18:52,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:18:52,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:18:52,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:18:52,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:18:52,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:18:52,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:18:52,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:18:52,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:18:52,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-20 12:18:52,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:18:52,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:18:52,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:18:52,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:18:52,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:18:52,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:18:52,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:18:52,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:18:52,461 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:18:52,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:18:52,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:18:52,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:18:52,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:18:52,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:18:52,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:18:52,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 12:18:52,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 12:18:52,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:18:52,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:18:52,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:18:52,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:18:52,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:18:52,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:18:52,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:18:52,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:18:52,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:18:52,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:18:52,466 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 12:18:52,466 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 12:18:52,466 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:18:52,467 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:18:52,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:18:52,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 12:18:52,467 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_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3218f6ce73718f4714eadf36a1447f6463508e41642c256f71b5032b295cfea0 [2022-11-20 12:18:52,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:18:52,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:18:52,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:18:52,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:18:52,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:18:53,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c [2022-11-20 12:18:56,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:18:57,259 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:18:57,259 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c [2022-11-20 12:18:57,300 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/19e483191/49b4ac929c084903acd939c9f8f6ae17/FLAG47088cce0 [2022-11-20 12:18:57,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/data/19e483191/49b4ac929c084903acd939c9f8f6ae17 [2022-11-20 12:18:57,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:18:57,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:18:57,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:18:57,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:18:57,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:18:57,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:57" (1/1) ... [2022-11-20 12:18:57,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761caebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:57, skipping insertion in model container [2022-11-20 12:18:57,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:18:57" (1/1) ... [2022-11-20 12:18:57,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:18:57,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:18:57,735 WARN L237 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_dd78f90e-05cf-4852-8a06-4e52586c22e7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c[1014,1027] [2022-11-20 12:18:58,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:18:58,552 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:18:58,566 WARN L237 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_dd78f90e-05cf-4852-8a06-4e52586c22e7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cambridge.1.prop2-back-serstep.c[1014,1027] [2022-11-20 12:18:58,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:18:58,922 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:18:58,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58 WrapperNode [2022-11-20 12:18:58,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:18:58,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:18:58,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:18:58,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:18:58,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,386 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5107 [2022-11-20 12:18:59,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:18:59,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:18:59,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:18:59,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:18:59,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:18:59,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:18:59,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:18:59,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:18:59,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (1/1) ... [2022-11-20 12:18:59,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:18:59,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:18:59,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:18:59,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:18:59,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:18:59,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:19:01,087 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:19:01,089 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:19:15,685 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:19:15,694 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:19:15,694 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:19:15,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:19:15 BoogieIcfgContainer [2022-11-20 12:19:15,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:19:15,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:19:15,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:19:15,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:19:15,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:18:57" (1/3) ... [2022-11-20 12:19:15,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e4b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:19:15, skipping insertion in model container [2022-11-20 12:19:15,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:18:58" (2/3) ... [2022-11-20 12:19:15,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e4b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:19:15, skipping insertion in model container [2022-11-20 12:19:15,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:19:15" (3/3) ... [2022-11-20 12:19:15,712 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cambridge.1.prop2-back-serstep.c [2022-11-20 12:19:15,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:19:15,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:19:15,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:19:15,822 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ba79a71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:19:15,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:19:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 12:19:15,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:15,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 12:19:15,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-20 12:19:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:19:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661712176] [2022-11-20 12:19:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:15,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:19:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:19:15,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:19:15,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 12:19:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:19:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:17,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:19:17,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:19:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661712176] [2022-11-20 12:19:17,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661712176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:19:17,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:19:17,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:19:17,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921559085] [2022-11-20 12:19:17,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:19:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:19:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:19:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:19:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:19:17,715 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:21,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:19:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:21,324 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-20 12:19:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:19:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 12:19:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:21,337 INFO L225 Difference]: With dead ends: 19 [2022-11-20 12:19:21,338 INFO L226 Difference]: Without dead ends: 10 [2022-11-20 12:19:21,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:19:21,348 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 12:19:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-20 12:19:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-20 12:19:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-20 12:19:21,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-20 12:19:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:21,390 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-20 12:19:21,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-20 12:19:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:19:21,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:21,392 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 12:19:21,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 12:19:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:19:21,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-20 12:19:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:19:21,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831327821] [2022-11-20 12:19:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:19:21,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:19:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:19:21,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:19:21,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 12:19:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:19:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 4547 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 12:19:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:19:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:42,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:19:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:19:43,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:19:43,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831327821] [2022-11-20 12:19:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831327821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:19:43,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:19:43,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-20 12:19:43,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41391140] [2022-11-20 12:19:43,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:19:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:19:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:19:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:19:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:19:43,936 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:46,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:19:50,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:19:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:19:50,239 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-20 12:19:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:19:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 12:19:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:19:50,242 INFO L225 Difference]: With dead ends: 15 [2022-11-20 12:19:50,242 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 12:19:50,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:19:50,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:19:50,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 2 Unknown, 6 Unchecked, 6.1s Time] [2022-11-20 12:19:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 12:19:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 12:19:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-20 12:19:50,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-20 12:19:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:19:50,251 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-20 12:19:50,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:19:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-20 12:19:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:19:50,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:19:50,253 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 12:19:50,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:19:50,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:19:50,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:19:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:19:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-20 12:19:50,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:19:50,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872456190] [2022-11-20 12:19:50,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:19:50,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:19:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:19:50,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:19:50,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 12:20:58,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:20:58,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:20:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 8720 conjuncts, 273 conjunts are in the unsatisfiable core [2022-11-20 12:20:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:21:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:21:07,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:21:44,770 WARN L233 SmtUtils]: Spent 29.08s on a formula simplification. DAG size of input: 653 DAG size of output: 649 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:21:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:21:55,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:21:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872456190] [2022-11-20 12:21:55,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872456190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:21:55,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:21:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-20 12:21:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099418401] [2022-11-20 12:21:55,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:21:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:21:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:21:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:21:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:21:55,234 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:21:58,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.74s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:22:02,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 12:22:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:22:02,427 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-20 12:22:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:22:02,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 12:22:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:22:02,428 INFO L225 Difference]: With dead ends: 18 [2022-11-20 12:22:02,428 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 12:22:02,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:22:02,430 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:22:02,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 2 Unknown, 13 Unchecked, 6.0s Time] [2022-11-20 12:22:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 12:22:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-20 12:22:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:22:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-20 12:22:02,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-20 12:22:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:22:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-20 12:22:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:22:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-20 12:22:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:22:02,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:22:02,442 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-20 12:22:02,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-20 12:22:02,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:22:02,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:22:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:22:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-20 12:22:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:22:02,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217716023] [2022-11-20 12:22:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:22:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:22:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:22:02,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:22:02,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd78f90e-05cf-4852-8a06-4e52586c22e7/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 12:27:05,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:27:05,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 12893 conjuncts, 1541 conjunts are in the unsatisfiable core [2022-11-20 12:27:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:20,329 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 628 DAG size of output: 627 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:27:35,612 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification that was a NOOP. DAG size: 762 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)