./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-5e519f3 [2022-11-03 02:31:14,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:31:14,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:31:14,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:31:14,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:31:14,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:31:14,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:31:14,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:31:14,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:31:14,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:31:14,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:31:14,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:31:14,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:31:14,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:31:14,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:31:14,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:31:14,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:31:14,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:31:14,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:31:14,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:31:14,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:31:14,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:31:14,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:31:14,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:31:14,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:31:14,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:31:14,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:31:14,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:31:14,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:31:14,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:31:14,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:31:14,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:31:14,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:31:14,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:31:14,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:31:14,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:31:14,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:31:14,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:31:14,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:31:14,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:31:14,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:31:14,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:31:14,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:31:14,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:31:14,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:31:14,784 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:31:14,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:31:14,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:31:14,785 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:31:14,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:31:14,786 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:31:14,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:31:14,787 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:31:14,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:31:14,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:31:14,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:31:14,788 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:31:14,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:31:14,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:31:14,789 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:31:14,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:31:14,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:31:14,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:31:14,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:31:14,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:31:14,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:31:14,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:31:14,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:31:14,793 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:31:14,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:31:14,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:31:14,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:31:14,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:31:14,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:31:14,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:14,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:31:14,796 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:31:14,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:31:14,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:31:14,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:31:14,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:31:14,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:31:14,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:31:14,797 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_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-03 02:31:15,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:31:15,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:31:15,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:31:15,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:31:15,125 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:31:15,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-03 02:31:15,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/0a96e1151/57c2d7ac00c14f6c81d2e45f29ebbf3f/FLAG036ed7c82 [2022-11-03 02:31:15,516 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.cdt.parser.UltimateCdtExternalSettingsProvider.getSettings(UltimateCdtExternalSettingsProvider.java:67) at org.eclipse.cdt.core.settings.model.extension.CExternalSettingProvider.getSettings(CExternalSettingProvider.java:48) at org.eclipse.cdt.internal.core.settings.model.ExtensionContainerFactory$CExtensionSettingProviderDescriptor.getContainer(ExtensionContainerFactory.java:110) at org.eclipse.cdt.internal.core.settings.model.ExtensionContainerFactory.createContainer(ExtensionContainerFactory.java:186) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager$ContainerDescriptor.(CExternalSettingsManager.java:147) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager.checkExternalSettingsChange(CExternalSettingsManager.java:683) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager.processContainerChange(CExternalSettingsManager.java:501) at org.eclipse.cdt.internal.core.settings.model.CExternalSettingsManager$2.run(CExternalSettingsManager.java:615) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager$5.run(CProjectDescriptionManager.java:508) at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2292) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.runAtomic(CProjectDescriptionManager.java:504) at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager$4.run(CProjectDescriptionManager.java:484) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:31:15,686 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:31:15,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-03 02:31:15,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/0a96e1151/57c2d7ac00c14f6c81d2e45f29ebbf3f/FLAG036ed7c82 [2022-11-03 02:31:16,059 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/0a96e1151/57c2d7ac00c14f6c81d2e45f29ebbf3f [2022-11-03 02:31:16,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:31:16,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:31:16,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:16,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:31:16,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:31:16,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69727c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16, skipping insertion in model container [2022-11-03 02:31:16,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:31:16,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:31:16,343 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_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-03 02:31:16,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:16,445 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:31:16,460 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_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-03 02:31:16,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:16,530 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:31:16,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16 WrapperNode [2022-11-03 02:31:16,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:16,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:16,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:31:16,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:31:16,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,570 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2022-11-03 02:31:16,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:16,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:31:16,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:31:16,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:31:16,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:31:16,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:31:16,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:31:16,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:31:16,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (1/1) ... [2022-11-03 02:31:16,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:16,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:31:16,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:31:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:31:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:31:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:31:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:31:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:31:16,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:31:16,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:31:16,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:31:16,804 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:31:16,806 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:31:17,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:31:17,200 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:31:17,200 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:31:17,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:17 BoogieIcfgContainer [2022-11-03 02:31:17,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:31:17,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:31:17,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:31:17,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:31:17,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:31:16" (1/3) ... [2022-11-03 02:31:17,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdc126b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:17, skipping insertion in model container [2022-11-03 02:31:17,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:16" (2/3) ... [2022-11-03 02:31:17,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fdc126b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:17, skipping insertion in model container [2022-11-03 02:31:17,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:17" (3/3) ... [2022-11-03 02:31:17,219 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-03 02:31:17,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:31:17,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:31:17,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:31:17,292 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@563c1220, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:31:17,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:31:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 02:31:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:31:17,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:17,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:17,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 309625488, now seen corresponding path program 1 times [2022-11-03 02:31:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654503834] [2022-11-03 02:31:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:17,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:17,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654503834] [2022-11-03 02:31:17,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654503834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:17,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339918280] [2022-11-03 02:31:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:17,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:17,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:17,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:31:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:31:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:31:18,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:31:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339918280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524628245] [2022-11-03 02:31:18,579 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 02:31:18,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:18,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:18,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:18,590 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:18,787 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2022-11-03 02:31:18,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:19,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [524628245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:20,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:20,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 13, 11] total 28 [2022-11-03 02:31:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380199584] [2022-11-03 02:31:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:31:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:31:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:31:20,038 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:31:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:20,400 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2022-11-03 02:31:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:31:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-03 02:31:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:20,416 INFO L225 Difference]: With dead ends: 108 [2022-11-03 02:31:20,417 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 02:31:20,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:31:20,428 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 55 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:20,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 267 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:31:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 02:31:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-11-03 02:31:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 40 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:31:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-11-03 02:31:20,491 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2022-11-03 02:31:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:20,491 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-11-03 02:31:20,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:31:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-11-03 02:31:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:31:20,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:20,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:20,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:20,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:31:20,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1642942643, now seen corresponding path program 1 times [2022-11-03 02:31:20,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:20,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235095973] [2022-11-03 02:31:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:20,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235095973] [2022-11-03 02:31:20,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235095973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232658977] [2022-11-03 02:31:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:20,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:20,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:31:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:21,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:31:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:31:21,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:31:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232658977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134447155] [2022-11-03 02:31:21,469 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:31:21,469 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:21,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:21,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:21,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:21,634 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2022-11-03 02:31:21,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:23,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1134447155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:23,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:23,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 13, 11] total 31 [2022-11-03 02:31:23,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16659540] [2022-11-03 02:31:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:31:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:31:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:31:23,354 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:31:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:23,709 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2022-11-03 02:31:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:31:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-03 02:31:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:23,712 INFO L225 Difference]: With dead ends: 114 [2022-11-03 02:31:23,712 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 02:31:23,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:31:23,714 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 54 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:23,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 306 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:31:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 02:31:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2022-11-03 02:31:23,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 43 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-03 02:31:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-11-03 02:31:23,731 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 37 [2022-11-03 02:31:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:23,732 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-11-03 02:31:23,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:31:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-11-03 02:31:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:31:23,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:23,734 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-03 02:31:23,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:23,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:31:23,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -779990973, now seen corresponding path program 1 times [2022-11-03 02:31:23,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:23,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218140601] [2022-11-03 02:31:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:23,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:24,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218140601] [2022-11-03 02:31:24,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218140601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865998737] [2022-11-03 02:31:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:24,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:24,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:31:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:31:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:31:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:31:24,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865998737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:24,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179472079] [2022-11-03 02:31:24,813 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:31:24,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:24,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:24,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:24,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:25,864 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-03 02:31:25,870 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:26,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:28,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1196#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:28,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:28,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:28,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 11] total 23 [2022-11-03 02:31:28,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462780429] [2022-11-03 02:31:28,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:28,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:31:28,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:28,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:31:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:31:28,405 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 23 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:31:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:29,071 INFO L93 Difference]: Finished difference Result 157 states and 218 transitions. [2022-11-03 02:31:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:31:29,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 40 [2022-11-03 02:31:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:29,076 INFO L225 Difference]: With dead ends: 157 [2022-11-03 02:31:29,076 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:31:29,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=267, Invalid=2595, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:31:29,079 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:29,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 394 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:31:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:31:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2022-11-03 02:31:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:31:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-03 02:31:29,113 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 40 [2022-11-03 02:31:29,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:29,114 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-03 02:31:29,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:31:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-03 02:31:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:31:29,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:29,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:29,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:29,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:29,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -194318023, now seen corresponding path program 1 times [2022-11-03 02:31:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151755557] [2022-11-03 02:31:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:29,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151755557] [2022-11-03 02:31:29,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151755557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411063173] [2022-11-03 02:31:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:29,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:29,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:31:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:31:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:31:29,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:29,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411063173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:29,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144731034] [2022-11-03 02:31:29,813 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:31:29,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:29,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:29,814 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:29,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:30,198 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:30,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:31,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [144731034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:31,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:31,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6, 6, 6] total 30 [2022-11-03 02:31:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796761220] [2022-11-03 02:31:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:31,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:31:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:31:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:31:31,334 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:31:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:32,425 INFO L93 Difference]: Finished difference Result 120 states and 176 transitions. [2022-11-03 02:31:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:31:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-11-03 02:31:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:32,427 INFO L225 Difference]: With dead ends: 120 [2022-11-03 02:31:32,427 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:31:32,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:31:32,429 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 91 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:32,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 301 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:31:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:31:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2022-11-03 02:31:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 55 states have internal predecessors, (70), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-03 02:31:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-11-03 02:31:32,452 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 42 [2022-11-03 02:31:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:32,452 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-11-03 02:31:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:31:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-11-03 02:31:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:31:32,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:32,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:32,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:32,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1442386312, now seen corresponding path program 1 times [2022-11-03 02:31:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390235882] [2022-11-03 02:31:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:32,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390235882] [2022-11-03 02:31:32,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390235882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:32,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641815621] [2022-11-03 02:31:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:32,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:32,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:31:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:31:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:31:33,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:31:33,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641815621] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:33,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:33,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 10] total 19 [2022-11-03 02:31:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259787246] [2022-11-03 02:31:33,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:31:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:31:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:31:33,292 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:31:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:33,385 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2022-11-03 02:31:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:31:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-11-03 02:31:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:33,391 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:31:33,391 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:31:33,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:31:33,392 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:33,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 204 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:31:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-11-03 02:31:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 52 states have internal predecessors, (69), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:31:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-11-03 02:31:33,411 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 44 [2022-11-03 02:31:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:33,412 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-11-03 02:31:33,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:31:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-11-03 02:31:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:31:33,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:33,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:33,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:33,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash -929368441, now seen corresponding path program 1 times [2022-11-03 02:31:33,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:33,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160937658] [2022-11-03 02:31:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:33,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:33,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160937658] [2022-11-03 02:31:33,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160937658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264010466] [2022-11-03 02:31:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:33,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:31:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:31:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:31:33,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:33,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264010466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:33,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753804170] [2022-11-03 02:31:33,975 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:31:33,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:33,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:33,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:33,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:34,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:31:34,335 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:34,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:35,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2849#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:35,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:35,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:35,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-03 02:31:35,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006321448] [2022-11-03 02:31:35,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:35,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:31:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:31:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:31:35,835 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:36,094 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-11-03 02:31:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:31:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-03 02:31:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:36,096 INFO L225 Difference]: With dead ends: 182 [2022-11-03 02:31:36,097 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 02:31:36,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:31:36,099 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:36,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 136 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:31:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 02:31:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 75. [2022-11-03 02:31:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.296875) internal successors, (83), 63 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:31:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-11-03 02:31:36,123 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 45 [2022-11-03 02:31:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:36,123 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-11-03 02:31:36,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-11-03 02:31:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:31:36,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:36,125 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:36,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -599884568, now seen corresponding path program 1 times [2022-11-03 02:31:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520377648] [2022-11-03 02:31:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:36,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:36,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:36,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520377648] [2022-11-03 02:31:36,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520377648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:36,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277530526] [2022-11-03 02:31:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:36,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:36,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:36,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:36,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:31:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:31:36,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:31:36,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:36,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277530526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533940952] [2022-11-03 02:31:36,897 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:31:36,897 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:36,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:36,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:36,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:37,221 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:31:37,229 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:37,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:38,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3528#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:38,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:38,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:38,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-03 02:31:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723109528] [2022-11-03 02:31:38,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:31:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:31:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:31:38,977 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:31:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:44,042 INFO L93 Difference]: Finished difference Result 181 states and 250 transitions. [2022-11-03 02:31:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:31:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 02:31:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:44,044 INFO L225 Difference]: With dead ends: 181 [2022-11-03 02:31:44,044 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 02:31:44,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=286, Invalid=1195, Unknown=1, NotChecked=0, Total=1482 [2022-11-03 02:31:44,046 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:44,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 180 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:31:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 02:31:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 79. [2022-11-03 02:31:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.25) internal successors, (85), 67 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:31:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-11-03 02:31:44,080 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 47 [2022-11-03 02:31:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:44,081 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-11-03 02:31:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:31:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-11-03 02:31:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 02:31:44,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:44,082 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:44,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:31:44,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1311071609, now seen corresponding path program 2 times [2022-11-03 02:31:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913633187] [2022-11-03 02:31:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:44,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:44,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:44,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913633187] [2022-11-03 02:31:44,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913633187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:44,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810450902] [2022-11-03 02:31:44,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:31:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:44,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:44,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:31:44,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-03 02:31:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:31:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810450902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:45,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430468460] [2022-11-03 02:31:45,085 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:31:45,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:45,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:45,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:45,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:45,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2022-11-03 02:31:45,404 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:45,485 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:47,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4280#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:47,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:47,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:47,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-11-03 02:31:47,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645234605] [2022-11-03 02:31:47,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:47,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:31:47,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:31:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1340, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:31:47,117 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:47,654 INFO L93 Difference]: Finished difference Result 271 states and 388 transitions. [2022-11-03 02:31:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:31:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2022-11-03 02:31:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:47,658 INFO L225 Difference]: With dead ends: 271 [2022-11-03 02:31:47,658 INFO L226 Difference]: Without dead ends: 226 [2022-11-03 02:31:47,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=597, Invalid=1953, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:31:47,660 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 144 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:47,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 276 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:31:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-03 02:31:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 99. [2022-11-03 02:31:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.25) internal successors, (110), 87 states have internal predecessors, (110), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:31:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2022-11-03 02:31:47,719 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 57 [2022-11-03 02:31:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:47,721 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2022-11-03 02:31:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:31:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2022-11-03 02:31:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:31:47,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:47,724 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:47,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:47,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:31:47,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash -744811400, now seen corresponding path program 2 times [2022-11-03 02:31:47,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:47,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996254741] [2022-11-03 02:31:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:48,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:31:48,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996254741] [2022-11-03 02:31:48,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996254741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:48,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981190948] [2022-11-03 02:31:48,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:31:48,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:48,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:31:48,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-03 02:31:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:31:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 02:31:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:31:48,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:49,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981190948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106742917] [2022-11-03 02:31:49,289 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:31:49,290 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:31:49,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:31:49,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:31:49,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:31:49,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:31:49,608 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:31:49,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:51,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5239#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:51,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:51,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:31:51,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-03 02:31:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559202993] [2022-11-03 02:31:51,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:51,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:31:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:31:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1776, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:31:51,858 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:32:03,820 WARN L234 SmtUtils]: Spent 11.58s on a formula simplification. DAG size of input: 51 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:15,316 WARN L234 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 46 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:50,054 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2022-11-03 02:32:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 02:32:50,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2022-11-03 02:32:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:50,058 INFO L225 Difference]: With dead ends: 270 [2022-11-03 02:32:50,058 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 02:32:50,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=913, Invalid=3110, Unknown=9, NotChecked=0, Total=4032 [2022-11-03 02:32:50,060 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 343 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:50,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 563 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:32:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 02:32:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 109. [2022-11-03 02:32:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 97 states have internal predecessors, (117), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:32:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2022-11-03 02:32:50,094 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 62 [2022-11-03 02:32:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:50,094 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2022-11-03 02:32:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 31 states have internal predecessors, (112), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:32:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2022-11-03 02:32:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 02:32:50,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:50,096 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:50,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:50,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:50,301 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 217315975, now seen corresponding path program 3 times [2022-11-03 02:32:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:50,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771223282] [2022-11-03 02:32:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:50,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 3 proven. 308 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:32:50,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:50,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771223282] [2022-11-03 02:32:50,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771223282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:50,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508511242] [2022-11-03 02:32:50,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:50,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:50,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:50,825 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:50,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:32:50,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:32:50,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 20 proven. 301 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:32:51,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 3 proven. 308 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:32:52,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508511242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29043120] [2022-11-03 02:32:52,038 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:32:52,038 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:52,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:52,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:52,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:52,357 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:32:52,366 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:32:52,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:32:54,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6350#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:32:54,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:32:54,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:32:54,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-11-03 02:32:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290575393] [2022-11-03 02:32:54,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:32:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:32:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:32:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 02:32:54,166 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 50 states, 50 states have (on average 3.42) internal successors, (171), 50 states have internal predecessors, (171), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:32:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:55,242 INFO L93 Difference]: Finished difference Result 449 states and 652 transitions. [2022-11-03 02:32:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:32:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.42) internal successors, (171), 50 states have internal predecessors, (171), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-03 02:32:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:55,255 INFO L225 Difference]: With dead ends: 449 [2022-11-03 02:32:55,256 INFO L226 Difference]: Without dead ends: 404 [2022-11-03 02:32:55,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1925, Invalid=4881, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 02:32:55,259 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 492 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:55,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 338 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:32:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-03 02:32:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 147. [2022-11-03 02:32:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 135 states have internal predecessors, (164), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:32:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2022-11-03 02:32:55,308 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 81 [2022-11-03 02:32:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:55,309 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2022-11-03 02:32:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.42) internal successors, (171), 50 states have internal predecessors, (171), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:32:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2022-11-03 02:32:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:32:55,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:55,311 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:55,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:55,531 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1679124088, now seen corresponding path program 3 times [2022-11-03 02:32:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:32:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135101866] [2022-11-03 02:32:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:32:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 467 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:32:56,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:32:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135101866] [2022-11-03 02:32:56,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135101866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:32:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659857818] [2022-11-03 02:32:56,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:56,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:56,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:32:56,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:56,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:56,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:32:56,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 21 proven. 459 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:32:57,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 3 proven. 467 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:32:59,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659857818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37609834] [2022-11-03 02:32:59,246 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:32:59,246 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:32:59,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:32:59,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:32:59,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:32:59,545 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:32:59,553 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-03 02:32:59,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:33:02,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7869#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:33:02,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:33:02,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:33:02,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 61 [2022-11-03 02:33:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986402892] [2022-11-03 02:33:02,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:02,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-03 02:33:02,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:02,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-03 02:33:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=4893, Unknown=0, NotChecked=0, Total=5852 [2022-11-03 02:33:02,724 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand has 61 states, 61 states have (on average 3.3114754098360657) internal successors, (202), 61 states have internal predecessors, (202), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:33:40,224 WARN L234 SmtUtils]: Spent 27.75s on a formula simplification. DAG size of input: 61 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:42,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:34:14,451 WARN L234 SmtUtils]: Spent 22.79s on a formula simplification. DAG size of input: 56 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:36,721 WARN L234 SmtUtils]: Spent 15.13s on a formula simplification. DAG size of input: 51 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:55,989 WARN L234 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 46 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:06,552 WARN L234 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 41 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:13,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:15,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:18,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:35:41,135 WARN L234 SmtUtils]: Spent 17.84s on a formula simplification. DAG size of input: 66 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:31,112 WARN L234 SmtUtils]: Spent 42.31s on a formula simplification. DAG size of input: 76 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:58,718 WARN L234 SmtUtils]: Spent 17.78s on a formula simplification. DAG size of input: 71 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:28,178 WARN L234 SmtUtils]: Spent 15.68s on a formula simplification. DAG size of input: 66 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:59,788 WARN L234 SmtUtils]: Spent 19.87s on a formula simplification. DAG size of input: 61 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:26,298 WARN L234 SmtUtils]: Spent 10.92s on a formula simplification. DAG size of input: 56 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:38:51,470 WARN L234 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 51 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:14,179 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 46 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:41,161 WARN L234 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 41 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:08,671 INFO L93 Difference]: Finished difference Result 450 states and 630 transitions. [2022-11-03 02:41:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-03 02:41:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.3114754098360657) internal successors, (202), 61 states have internal predecessors, (202), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 92 [2022-11-03 02:41:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:08,675 INFO L225 Difference]: With dead ends: 450 [2022-11-03 02:41:08,675 INFO L226 Difference]: Without dead ends: 403 [2022-11-03 02:41:08,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3690 ImplicationChecksByTransitivity, 473.0s TimeCoverageRelationStatistics Valid=3022, Invalid=10246, Unknown=72, NotChecked=0, Total=13340 [2022-11-03 02:41:08,679 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 895 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 465 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 3964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:08,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1291 Invalid, 3964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 3496 Invalid, 3 Unknown, 0 Unchecked, 18.0s Time] [2022-11-03 02:41:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-03 02:41:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 169. [2022-11-03 02:41:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 157 states have internal predecessors, (182), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:41:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2022-11-03 02:41:08,735 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 92 [2022-11-03 02:41:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:08,736 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2022-11-03 02:41:08,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.3114754098360657) internal successors, (202), 61 states have internal predecessors, (202), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:41:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2022-11-03 02:41:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:41:08,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:08,737 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:08,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-03 02:41:08,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:41:08,938 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1293837432, now seen corresponding path program 4 times [2022-11-03 02:41:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:08,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022308591] [2022-11-03 02:41:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:08,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:09,027 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:41:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:41:09,135 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:41:09,136 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:41:09,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:41:09,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:41:09,143 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,147 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:41:09,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:41:09 BoogieIcfgContainer [2022-11-03 02:41:09,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:41:09,214 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:41:09,214 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:41:09,214 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:41:09,215 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:17" (3/4) ... [2022-11-03 02:41:09,218 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:41:09,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:41:09,226 INFO L158 Benchmark]: Toolchain (without parser) took 593163.56ms. Allocated memory was 107.0MB in the beginning and 232.8MB in the end (delta: 125.8MB). Free memory was 66.1MB in the beginning and 204.0MB in the end (delta: -138.0MB). Peak memory consumption was 121.9MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,227 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:41:09,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.46ms. Allocated memory is still 107.0MB. Free memory was 65.8MB in the beginning and 78.3MB in the end (delta: -12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.67ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 76.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,228 INFO L158 Benchmark]: Boogie Preprocessor took 27.54ms. Allocated memory is still 107.0MB. Free memory was 76.2MB in the beginning and 74.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,228 INFO L158 Benchmark]: RCFGBuilder took 601.04ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 54.4MB in the end (delta: 20.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,228 INFO L158 Benchmark]: TraceAbstraction took 592007.88ms. Allocated memory was 107.0MB in the beginning and 232.8MB in the end (delta: 125.8MB). Free memory was 53.9MB in the beginning and 70.6MB in the end (delta: -16.7MB). Peak memory consumption was 109.6MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,229 INFO L158 Benchmark]: Witness Printer took 11.98ms. Allocated memory is still 232.8MB. Free memory was 70.6MB in the beginning and 204.0MB in the end (delta: -133.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:41:09,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 466.46ms. Allocated memory is still 107.0MB. Free memory was 65.8MB in the beginning and 78.3MB in the end (delta: -12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.67ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 76.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.54ms. Allocated memory is still 107.0MB. Free memory was 76.2MB in the beginning and 74.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 601.04ms. Allocated memory is still 107.0MB. Free memory was 74.9MB in the beginning and 54.4MB in the end (delta: 20.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 592007.88ms. Allocated memory was 107.0MB in the beginning and 232.8MB in the end (delta: 125.8MB). Free memory was 53.9MB in the beginning and 70.6MB in the end (delta: -16.7MB). Peak memory consumption was 109.6MB. Max. memory is 16.1GB. * Witness Printer took 11.98ms. Allocated memory is still 232.8MB. Free memory was 70.6MB in the beginning and 204.0MB in the end (delta: -133.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 77, overapproximation of bitwiseAnd at line 76, overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L221] unsigned int a ; [L222] unsigned int ma = __VERIFIER_nondet_uint(); [L223] signed char ea = __VERIFIER_nondet_char(); [L224] unsigned int b ; [L225] unsigned int mb = __VERIFIER_nondet_uint(); [L226] signed char eb = __VERIFIER_nondet_char(); [L227] unsigned int r_mul ; [L228] unsigned int zero ; [L229] unsigned int one ; [L230] int sb ; [L231] int tmp ; [L232] int tmp___0 ; [L233] int tmp___1 ; [L234] int __retres16 ; VAL [ea=-128, eb=0] [L238] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L238] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-128, eb=0] [L238] zero = base2flt(0, 0) [L239] CALL, EXPR base2flt(1, 0) VAL [\old(e)=0, \old(m)=1] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L35] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L47] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=0, e=-24, m=0, res=0] [L80] return (__retres4); [L239] RET, EXPR base2flt(1, 0) VAL [base2flt(1, 0)=-4294967296, ea=-128, eb=0, zero=0] [L239] one = base2flt(1, 0) [L240] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-128, \old(m)=16777217] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L29] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L57] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777217, e=-128, m=16777217] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-128, \old(m)=16777217, __retres4=1, e=-128, m=1, res=1] [L80] return (__retres4); [L240] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967297, ea=-128, eb=0, ma=16777217, one=0, zero=0] [L240] a = base2flt(ma, ea) [L241] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(mb, eb) VAL [a=1, base2flt(mb, eb)=0, ea=-128, eb=0, ma=16777217, mb=0, one=0, zero=0] [L241] b = base2flt(mb, eb) [L242] CALL, EXPR mulflt(a, b) [L148] unsigned int res ; [L149] unsigned int ma ; [L150] unsigned int mb ; [L151] unsigned long long accu ; [L152] int ea ; [L153] int eb ; [L154] unsigned int tmp ; [L155] unsigned int __retres10 ; [L158] COND FALSE !(a < b) VAL [\old(a)=1, \old(b)=0, a=1, b=0, tmp=1] [L165] COND TRUE ! b [L166] __retres10 = 0U VAL [\old(a)=1, \old(b)=0, __retres10=0, a=1, b=0, tmp=1] [L217] return (__retres10); [L242] RET, EXPR mulflt(a, b) [L242] r_mul = mulflt(a, b) [L244] COND FALSE !(b < one) [L247] COND FALSE !(b > one) [L250] tmp = 0 [L252] sb = tmp VAL [a=1, b=0, ea=-128, eb=0, ma=16777217, mb=0, one=0, r_mul=0, sb=0, tmp=0, zero=0] [L254] COND TRUE sb == 0 [L255] COND TRUE r_mul < a [L256] tmp___1 = -1 VAL [a=1, b=0, ea=-128, eb=0, ma=16777217, mb=0, one=0, r_mul=0, sb=0, tmp=0, tmp___0=0, tmp___1=-1, zero=0] [L266] CALL __VERIFIER_assert(tmp___1 == 0) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 591.9s, OverallIterations: 12, TraceHistogramMax: 24, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 553.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 2416 SdHoareTripleChecker+Valid, 23.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2385 mSDsluCounter, 4256 SdHoareTripleChecker+Invalid, 21.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4840 mSDsCounter, 921 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7034 IncrementalHoareTripleChecker+Invalid, 7958 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 921 mSolverCounterUnsat, 481 mSDtfsCounter, 7034 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1959 GetRequests, 1414 SyntacticMatches, 10 SemanticMatches, 535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11180 ImplicationChecksByTransitivity, 552.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=11, InterpolantAutomatonStates: 274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 967 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 1268 NumberOfCodeBlocks, 1268 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1704 ConstructedInterpolants, 0 QuantifiedInterpolants, 6697 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1974 ConjunctsInSsa, 205 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 669/3627 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 49, DAG_INTERPRETER_EARLY_EXITS: 6, TOOLS_POST_APPLICATIONS: 66, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 24, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 16, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 106, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 154, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 49, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 16, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.1s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 804, DAG_COMPRESSION_RETAINED_NODES: 177, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:41:09,444 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-03 02:41:09,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 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_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-5e519f3 [2022-11-03 02:41:11,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:41:11,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:41:11,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:41:11,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:41:11,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:41:11,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:41:11,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:41:11,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:41:11,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:41:11,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:41:11,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:41:11,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:41:11,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:41:11,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:41:11,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:41:11,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:41:11,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:41:11,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:41:11,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:41:11,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:41:11,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:41:11,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:41:11,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:41:11,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:41:11,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:41:11,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:41:11,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:41:11,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:41:11,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:41:11,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:41:11,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:41:11,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:41:11,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:41:11,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:41:11,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:41:11,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:41:11,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:41:11,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:41:11,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:41:11,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:41:11,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:41:11,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:41:11,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:41:11,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:41:11,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:41:11,789 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:41:11,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:41:11,790 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:41:11,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:41:11,790 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:41:11,791 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:41:11,792 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:41:11,792 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:41:11,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:41:11,794 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:41:11,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:41:11,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:41:11,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:41:11,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:41:11,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:41:11,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:41:11,796 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:41:11,796 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:41:11,796 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:41:11,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:41:11,797 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:41:11,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:41:11,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:41:11,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:41:11,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:41:11,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:11,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:41:11,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:41:11,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:41:11,799 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:41:11,799 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:11,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:41:11,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:41:11,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:41:11,800 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_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-03 02:41:12,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:41:12,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:41:12,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:41:12,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:41:12,246 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:41:12,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-03 02:41:12,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/6dd7852bc/b39cc716b41e4cfa98b5dcf498959797/FLAGfed9c7aa8 [2022-11-03 02:41:12,851 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:41:12,853 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-03 02:41:12,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/6dd7852bc/b39cc716b41e4cfa98b5dcf498959797/FLAGfed9c7aa8 [2022-11-03 02:41:13,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/data/6dd7852bc/b39cc716b41e4cfa98b5dcf498959797 [2022-11-03 02:41:13,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:41:13,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:41:13,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:13,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:41:13,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:41:13,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4744849a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13, skipping insertion in model container [2022-11-03 02:41:13,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:41:13,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:41:13,475 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_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-03 02:41:13,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:13,570 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:13,582 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_666f217d-a7db-4190-8c2f-855990650120/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-03 02:41:13,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:13,622 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:13,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13 WrapperNode [2022-11-03 02:41:13,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:13,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:13,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:13,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:13,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,660 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2022-11-03 02:41:13,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:13,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:13,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:13,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:13,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:13,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:13,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:13,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:13,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (1/1) ... [2022-11-03 02:41:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:13,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:13,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:41:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:41:13,772 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:41:13,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:13,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:13,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:41:13,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:41:13,885 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:13,887 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:14,279 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:14,286 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:14,286 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:41:14,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:14 BoogieIcfgContainer [2022-11-03 02:41:14,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:14,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:14,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:14,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:14,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:41:13" (1/3) ... [2022-11-03 02:41:14,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c13980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:14, skipping insertion in model container [2022-11-03 02:41:14,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:13" (2/3) ... [2022-11-03 02:41:14,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c13980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:14, skipping insertion in model container [2022-11-03 02:41:14,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:14" (3/3) ... [2022-11-03 02:41:14,298 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-03 02:41:14,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:14,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:14,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:14,379 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1bb900d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:14,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 02:41:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:41:14,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:14,395 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:14,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2022-11-03 02:41:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:14,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887117361] [2022-11-03 02:41:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:14,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:14,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:14,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:41:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:14,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:14,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:14,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:14,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887117361] [2022-11-03 02:41:14,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887117361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:14,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:14,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:14,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065067737] [2022-11-03 02:41:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:14,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:14,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:14,691 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:14,818 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2022-11-03 02:41:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:14,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-03 02:41:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:14,830 INFO L225 Difference]: With dead ends: 113 [2022-11-03 02:41:14,831 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 02:41:14,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:14,837 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:14,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:14,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 02:41:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-11-03 02:41:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:41:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2022-11-03 02:41:14,900 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2022-11-03 02:41:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:14,901 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2022-11-03 02:41:14,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2022-11-03 02:41:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:41:14,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:14,908 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:14,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:15,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1421820539, now seen corresponding path program 1 times [2022-11-03 02:41:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:15,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894143853] [2022-11-03 02:41:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:15,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:15,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:15,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:41:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:15,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:15,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:15,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894143853] [2022-11-03 02:41:15,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894143853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:15,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:15,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:15,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908007122] [2022-11-03 02:41:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:15,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:15,311 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:15,473 INFO L93 Difference]: Finished difference Result 105 states and 150 transitions. [2022-11-03 02:41:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-11-03 02:41:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:15,477 INFO L225 Difference]: With dead ends: 105 [2022-11-03 02:41:15,478 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 02:41:15,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:15,480 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:15,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 02:41:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-03 02:41:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:41:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2022-11-03 02:41:15,503 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 44 [2022-11-03 02:41:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:15,503 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2022-11-03 02:41:15,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2022-11-03 02:41:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:41:15,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:15,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:15,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:15,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:15,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash -865634876, now seen corresponding path program 1 times [2022-11-03 02:41:15,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:15,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714537908] [2022-11-03 02:41:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:15,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:15,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:15,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:41:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:15,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:15,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:15,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714537908] [2022-11-03 02:41:15,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714537908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:15,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:15,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94067449] [2022-11-03 02:41:15,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:15,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:15,879 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:16,028 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2022-11-03 02:41:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-11-03 02:41:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:16,034 INFO L225 Difference]: With dead ends: 114 [2022-11-03 02:41:16,035 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 02:41:16,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:16,039 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:16,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 02:41:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-03 02:41:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:41:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-03 02:41:16,056 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-03 02:41:16,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:16,057 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-03 02:41:16,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-03 02:41:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:41:16,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:16,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:16,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:16,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:16,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 155611130, now seen corresponding path program 1 times [2022-11-03 02:41:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:16,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357119118] [2022-11-03 02:41:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:16,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:16,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:41:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:16,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:16,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:16,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357119118] [2022-11-03 02:41:16,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357119118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:16,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:16,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:41:16,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966656179] [2022-11-03 02:41:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:16,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:16,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:16,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:16,422 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:16,602 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-11-03 02:41:16,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:41:16,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-03 02:41:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:16,605 INFO L225 Difference]: With dead ends: 122 [2022-11-03 02:41:16,605 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:41:16,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:16,607 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:16,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 194 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:41:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:41:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-11-03 02:41:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 49 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:41:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-11-03 02:41:16,623 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 46 [2022-11-03 02:41:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:16,624 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-11-03 02:41:16,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-11-03 02:41:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:41:16,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:16,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:16,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:16,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:16,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash 709732423, now seen corresponding path program 1 times [2022-11-03 02:41:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048019711] [2022-11-03 02:41:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:16,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:16,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:16,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:41:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:16,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:17,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048019711] [2022-11-03 02:41:17,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048019711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203504911] [2022-11-03 02:41:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:17,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:17,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:41:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:17,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:41:17,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:41:17,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:17,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203504911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:17,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:17,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-03 02:41:17,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354380213] [2022-11-03 02:41:17,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:17,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:17,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:41:17,330 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:17,345 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-03 02:41:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-03 02:41:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:17,347 INFO L225 Difference]: With dead ends: 66 [2022-11-03 02:41:17,348 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:41:17,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:41:17,349 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:17,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:41:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-03 02:41:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:41:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-03 02:41:17,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 47 [2022-11-03 02:41:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:17,369 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-03 02:41:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-03 02:41:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:41:17,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:17,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:17,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:17,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:17,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:17,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -37920403, now seen corresponding path program 1 times [2022-11-03 02:41:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200596099] [2022-11-03 02:41:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:17,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:17,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:41:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:17,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:18,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:18,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200596099] [2022-11-03 02:41:18,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200596099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295354142] [2022-11-03 02:41:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:18,115 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:18,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:18,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:41:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:41:18,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:18,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295354142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:18,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:18,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-03 02:41:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923106377] [2022-11-03 02:41:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:18,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:18,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:41:18,286 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:18,320 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-11-03 02:41:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-03 02:41:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:18,322 INFO L225 Difference]: With dead ends: 67 [2022-11-03 02:41:18,323 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:41:18,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:41:18,324 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:18,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:41:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-03 02:41:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:41:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-11-03 02:41:18,333 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 49 [2022-11-03 02:41:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:18,333 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-11-03 02:41:18,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-11-03 02:41:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:41:18,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:18,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:18,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:18,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:18,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:18,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -847267029, now seen corresponding path program 1 times [2022-11-03 02:41:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:18,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040688693] [2022-11-03 02:41:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:18,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:18,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:41:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:18,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:19,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040688693] [2022-11-03 02:41:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040688693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145188615] [2022-11-03 02:41:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:19,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:19,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:41:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:41:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:41:19,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:19,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145188615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:19,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:19,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-03 02:41:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151471580] [2022-11-03 02:41:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:19,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:41:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:41:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:41:19,246 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:19,322 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2022-11-03 02:41:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-03 02:41:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:19,325 INFO L225 Difference]: With dead ends: 97 [2022-11-03 02:41:19,325 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:41:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:41:19,326 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:19,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 278 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:41:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-11-03 02:41:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.309090909090909) internal successors, (72), 57 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 02:41:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2022-11-03 02:41:19,357 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 49 [2022-11-03 02:41:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:19,359 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2022-11-03 02:41:19,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2022-11-03 02:41:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:41:19,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:19,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:19,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-11-03 02:41:19,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:19,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:19,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1434073043, now seen corresponding path program 1 times [2022-11-03 02:41:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021277225] [2022-11-03 02:41:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:19,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:19,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:19,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:19,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:41:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:19,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:19,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:19,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:20,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021277225] [2022-11-03 02:41:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021277225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468750827] [2022-11-03 02:41:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,072 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:20,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:20,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:20,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:41:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:20,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:41:20,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:41:20,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [468750827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:20,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708811384] [2022-11-03 02:41:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:20,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:41:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:20,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:20,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708811384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:20,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:20,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-03 02:41:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851535494] [2022-11-03 02:41:20,578 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:41:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:41:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:41:20,579 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:21,213 INFO L93 Difference]: Finished difference Result 185 states and 269 transitions. [2022-11-03 02:41:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:41:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2022-11-03 02:41:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:21,215 INFO L225 Difference]: With dead ends: 185 [2022-11-03 02:41:21,215 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 02:41:21,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:41:21,217 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:21,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 399 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:41:21,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 02:41:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2022-11-03 02:41:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 states have internal predecessors, (112), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 02:41:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-11-03 02:41:21,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 49 [2022-11-03 02:41:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:21,231 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-11-03 02:41:21,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:41:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-11-03 02:41:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:41:21,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:21,233 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:21,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:21,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-11-03 02:41:21,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:21,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:21,845 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash -500635246, now seen corresponding path program 1 times [2022-11-03 02:41:21,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949111406] [2022-11-03 02:41:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:21,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:21,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:21,848 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:21,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:41:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:21,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:22,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949111406] [2022-11-03 02:41:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949111406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1216697468] [2022-11-03 02:41:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:22,138 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:22,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 02:41:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:41:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:41:22,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:22,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1216697468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:22,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:41:22,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 02:41:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038017535] [2022-11-03 02:41:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:41:22,304 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:22,387 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-11-03 02:41:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:41:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-03 02:41:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:22,389 INFO L225 Difference]: With dead ends: 118 [2022-11-03 02:41:22,389 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 02:41:22,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:22,390 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:22,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 02:41:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-11-03 02:41:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-03 02:41:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2022-11-03 02:41:22,415 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 53 [2022-11-03 02:41:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:22,415 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2022-11-03 02:41:22,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2022-11-03 02:41:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:41:22,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:22,418 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:22,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:22,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:22,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:22,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -443376944, now seen corresponding path program 1 times [2022-11-03 02:41:22,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:22,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311849464] [2022-11-03 02:41:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:22,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:22,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:22,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:41:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:22,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:22,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:22,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:23,096 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:23,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311849464] [2022-11-03 02:41:23,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311849464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [386455174] [2022-11-03 02:41:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:23,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:23,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:23,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:41:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:23,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:23,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [386455174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642398421] [2022-11-03 02:41:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:23,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:23,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:23,359 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:41:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:41:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:41:23,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:41:23,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642398421] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:23,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-03 02:41:23,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-03 02:41:23,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831114689] [2022-11-03 02:41:23,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:41:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:41:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:41:23,671 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:23,743 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-11-03 02:41:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-03 02:41:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:23,745 INFO L225 Difference]: With dead ends: 116 [2022-11-03 02:41:23,745 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 02:41:23,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:41:23,746 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:23,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 290 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:41:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 02:41:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-03 02:41:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 02:41:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-11-03 02:41:23,757 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2022-11-03 02:41:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:23,757 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-11-03 02:41:23,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:41:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-11-03 02:41:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:41:23,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:23,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:23,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:23,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:24,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:24,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:24,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2022-11-03 02:41:24,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:24,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097630481] [2022-11-03 02:41:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:24,376 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:41:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:24,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:24,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097630481] [2022-11-03 02:41:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097630481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824643546] [2022-11-03 02:41:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:24,656 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:41:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:24,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:24,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824643546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:24,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524262933] [2022-11-03 02:41:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:24,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:24,904 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:41:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:41:24,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:25,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:25,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524262933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:25,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:25,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-03 02:41:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68403017] [2022-11-03 02:41:25,221 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:25,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:41:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:41:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:41:25,223 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:25,620 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2022-11-03 02:41:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:41:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2022-11-03 02:41:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:25,622 INFO L225 Difference]: With dead ends: 223 [2022-11-03 02:41:25,622 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 02:41:25,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:41:25,623 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:25,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 306 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:41:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 02:41:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2022-11-03 02:41:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 02:41:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-03 02:41:25,638 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2022-11-03 02:41:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:25,639 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-03 02:41:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-03 02:41:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:41:25,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:25,641 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:25,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:25,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:26,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:26,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 1 times [2022-11-03 02:41:26,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:26,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38260750] [2022-11-03 02:41:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:26,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:26,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:26,247 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:41:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:41:26,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:26,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38260750] [2022-11-03 02:41:26,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38260750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [557616082] [2022-11-03 02:41:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:26,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:26,894 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:41:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:41:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:27,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:27,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [557616082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212541726] [2022-11-03 02:41:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:27,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:27,276 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:27,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:41:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:41:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:27,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:28,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212541726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:28,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:28,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:41:28,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77935973] [2022-11-03 02:41:28,129 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:28,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:41:28,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:41:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:41:28,130 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:29,616 INFO L93 Difference]: Finished difference Result 270 states and 385 transitions. [2022-11-03 02:41:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:41:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-03 02:41:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:29,623 INFO L225 Difference]: With dead ends: 270 [2022-11-03 02:41:29,623 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 02:41:29,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:41:29,626 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 311 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:29,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 526 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:41:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 02:41:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 117. [2022-11-03 02:41:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 02:41:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2022-11-03 02:41:29,644 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2022-11-03 02:41:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:29,645 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2022-11-03 02:41:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2022-11-03 02:41:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:41:29,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:29,646 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:29,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:29,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:30,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:30,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2022-11-03 02:41:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172430127] [2022-11-03 02:41:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:30,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:30,260 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:41:30,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:30,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:41:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:30,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:30,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172430127] [2022-11-03 02:41:30,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172430127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71906912] [2022-11-03 02:41:30,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:30,859 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:30,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:41:30,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:30,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:41:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:31,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71906912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564006389] [2022-11-03 02:41:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:31,229 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:31,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:41:31,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:41:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:31,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564006389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:31,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:31,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-03 02:41:31,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111247173] [2022-11-03 02:41:31,965 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:41:31,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:41:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:41:31,968 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:33,112 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2022-11-03 02:41:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:41:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-03 02:41:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:33,115 INFO L225 Difference]: With dead ends: 293 [2022-11-03 02:41:33,115 INFO L226 Difference]: Without dead ends: 183 [2022-11-03 02:41:33,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:41:33,117 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 388 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:33,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 631 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:41:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-03 02:41:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2022-11-03 02:41:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 02:41:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2022-11-03 02:41:33,136 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2022-11-03 02:41:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:33,137 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2022-11-03 02:41:33,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2022-11-03 02:41:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:41:33,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:33,138 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:33,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:33,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-03 02:41:33,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:33,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 2 times [2022-11-03 02:41:33,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:33,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878269800] [2022-11-03 02:41:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:33,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:33,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:33,752 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:33,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:41:33,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:33,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:41:33,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:34,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:35,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878269800] [2022-11-03 02:41:35,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878269800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1095862823] [2022-11-03 02:41:35,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:35,440 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:35,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:41:35,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:35,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:41:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:35,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1095862823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965109357] [2022-11-03 02:41:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:41:36,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:36,114 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:41:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:41:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:41:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:41:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965109357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:38,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:38,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-03 02:41:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542606540] [2022-11-03 02:41:38,427 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:38,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:41:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:41:38,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:41:38,430 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:45,171 INFO L93 Difference]: Finished difference Result 396 states and 585 transitions. [2022-11-03 02:41:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:41:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-03 02:41:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:45,175 INFO L225 Difference]: With dead ends: 396 [2022-11-03 02:41:45,175 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:41:45,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 02:41:45,178 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 747 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:45,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1767 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:41:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:41:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2022-11-03 02:41:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-03 02:41:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2022-11-03 02:41:45,207 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2022-11-03 02:41:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:45,207 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2022-11-03 02:41:45,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:41:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2022-11-03 02:41:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:41:45,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:45,209 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:45,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:45,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 02:41:45,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 02:41:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:41:45,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:45,813 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2022-11-03 02:41:45,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:45,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545230844] [2022-11-03 02:41:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:45,814 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:45,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:41:45,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 02:41:45,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:41:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:41:47,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:41:51,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:51,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545230844] [2022-11-03 02:41:51,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545230844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1987824400] [2022-11-03 02:41:51,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:41:51,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:51,010 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:51,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:41:51,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 02:41:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:41:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:41:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:42:03,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:42:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1987824400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547730721] [2022-11-03 02:42:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:42:05,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:05,051 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:05,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 02:42:05,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-03 02:42:05,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:42:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:42:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:42:07,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:42:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547730721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:10,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:10,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-03 02:42:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796387696] [2022-11-03 02:42:10,855 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-03 02:42:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-03 02:42:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-03 02:42:10,859 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:43:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:17,440 INFO L93 Difference]: Finished difference Result 586 states and 1017 transitions. [2022-11-03 02:43:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-03 02:43:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-03 02:43:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:17,447 INFO L225 Difference]: With dead ends: 586 [2022-11-03 02:43:17,447 INFO L226 Difference]: Without dead ends: 434 [2022-11-03 02:43:17,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 476 SyntacticMatches, 18 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19130 ImplicationChecksByTransitivity, 73.3s TimeCoverageRelationStatistics Valid=9724, Invalid=48592, Unknown=6, NotChecked=0, Total=58322 [2022-11-03 02:43:17,464 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 2998 mSDsluCounter, 4076 mSDsCounter, 0 mSdLazyCounter, 8239 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3034 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 8239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4124 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:17,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3034 Valid, 4170 Invalid, 12620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [257 Valid, 8239 Invalid, 0 Unknown, 4124 Unchecked, 13.6s Time] [2022-11-03 02:43:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-03 02:43:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 186. [2022-11-03 02:43:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 170 states have (on average 1.4529411764705882) internal successors, (247), 173 states have internal predecessors, (247), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-03 02:43:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2022-11-03 02:43:17,563 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 91 [2022-11-03 02:43:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:17,564 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2022-11-03 02:43:17,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-03 02:43:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2022-11-03 02:43:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 02:43:17,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:17,566 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:17,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-03 02:43:17,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 02:43:17,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-03 02:43:18,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:18,190 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:18,190 INFO L85 PathProgramCache]: Analyzing trace with hash 861370134, now seen corresponding path program 3 times [2022-11-03 02:43:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:18,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165455425] [2022-11-03 02:43:18,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:43:18,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:18,193 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:18,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:43:18,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 02:43:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:43:18,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:43:26,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:26,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165455425] [2022-11-03 02:43:26,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165455425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:26,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1586784225] [2022-11-03 02:43:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:43:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:26,434 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:26,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 02:43:26,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 02:43:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:26,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:43:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:43:28,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1586784225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:28,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095242553] [2022-11-03 02:43:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:43:28,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:28,948 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:28,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 02:43:29,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-03 02:43:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:43:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:43:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:43:29,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:43:31,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095242553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:31,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-11-03 02:43:31,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518769149] [2022-11-03 02:43:31,071 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 02:43:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 02:43:31,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:43:31,074 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:44:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:10,074 INFO L93 Difference]: Finished difference Result 659 states and 1132 transitions. [2022-11-03 02:44:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 02:44:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-11-03 02:44:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:10,080 INFO L225 Difference]: With dead ends: 659 [2022-11-03 02:44:10,080 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 02:44:10,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 02:44:10,084 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2349 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 4455 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 5459 SdHoareTripleChecker+Invalid, 4822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 4455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:10,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2349 Valid, 5459 Invalid, 4822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 4455 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-11-03 02:44:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 02:44:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 236. [2022-11-03 02:44:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 220 states have (on average 1.5) internal successors, (330), 223 states have internal predecessors, (330), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (33), 9 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-03 02:44:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 371 transitions. [2022-11-03 02:44:10,163 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 371 transitions. Word has length 116 [2022-11-03 02:44:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:10,163 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 371 transitions. [2022-11-03 02:44:10,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:44:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 371 transitions. [2022-11-03 02:44:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:44:10,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:10,165 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:10,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:10,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-03 02:44:10,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:10,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:10,769 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1103110160, now seen corresponding path program 1 times [2022-11-03 02:44:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:10,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440715389] [2022-11-03 02:44:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:10,771 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:10,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:44:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:10,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:10,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440715389] [2022-11-03 02:44:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440715389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376142577] [2022-11-03 02:44:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:10,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:10,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:11,002 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:11,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:44:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:11,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376142577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182262073] [2022-11-03 02:44:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:11,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:11,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:11,216 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:11,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:44:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:11,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-03 02:44:11,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182262073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:11,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:11,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2022-11-03 02:44:11,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637829005] [2022-11-03 02:44:11,416 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:11,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:44:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:44:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:11,419 INFO L87 Difference]: Start difference. First operand 236 states and 371 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:44:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:11,607 INFO L93 Difference]: Finished difference Result 252 states and 386 transitions. [2022-11-03 02:44:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:44:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-03 02:44:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:11,610 INFO L225 Difference]: With dead ends: 252 [2022-11-03 02:44:11,610 INFO L226 Difference]: Without dead ends: 226 [2022-11-03 02:44:11,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:44:11,612 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:11,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 390 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-03 02:44:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2022-11-03 02:44:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 203 states have (on average 1.5172413793103448) internal successors, (308), 207 states have internal predecessors, (308), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-03 02:44:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 337 transitions. [2022-11-03 02:44:11,671 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 337 transitions. Word has length 124 [2022-11-03 02:44:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:11,672 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 337 transitions. [2022-11-03 02:44:11,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:44:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 337 transitions. [2022-11-03 02:44:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:44:11,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:11,676 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:11,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:11,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 02:44:12,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 02:44:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:12,278 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1474812810, now seen corresponding path program 1 times [2022-11-03 02:44:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:12,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732280115] [2022-11-03 02:44:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:12,280 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:12,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:44:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:12,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:44:12,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-03 02:44:12,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:12,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732280115] [2022-11-03 02:44:12,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732280115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:12,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:12,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329602957] [2022-11-03 02:44:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:12,416 INFO L87 Difference]: Start difference. First operand 218 states and 337 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:44:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:12,543 INFO L93 Difference]: Finished difference Result 254 states and 379 transitions. [2022-11-03 02:44:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 125 [2022-11-03 02:44:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:12,546 INFO L225 Difference]: With dead ends: 254 [2022-11-03 02:44:12,546 INFO L226 Difference]: Without dead ends: 242 [2022-11-03 02:44:12,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:12,548 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 53 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:12,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 249 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-03 02:44:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 219. [2022-11-03 02:44:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 204 states have (on average 1.5147058823529411) internal successors, (309), 208 states have internal predecessors, (309), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-03 02:44:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 338 transitions. [2022-11-03 02:44:12,612 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 338 transitions. Word has length 125 [2022-11-03 02:44:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:12,613 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 338 transitions. [2022-11-03 02:44:12,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:44:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 338 transitions. [2022-11-03 02:44:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:44:12,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:12,615 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:12,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:44:12,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:12,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 888006796, now seen corresponding path program 4 times [2022-11-03 02:44:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:12,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105669009] [2022-11-03 02:44:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:44:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:12,831 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:12,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:44:12,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:44:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:44:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:16,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:22,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105669009] [2022-11-03 02:44:22,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105669009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140089257] [2022-11-03 02:44:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:44:22,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:22,892 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:22,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:44:23,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:44:23,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:44:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:23,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:25,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140089257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:25,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207308229] [2022-11-03 02:44:25,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:44:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:25,674 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:25,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_666f217d-a7db-4190-8c2f-855990650120/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:44:25,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:44:25,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:44:25,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:44:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:44:38,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207308229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:38,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:38,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 122 [2022-11-03 02:44:38,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6572725] [2022-11-03 02:44:38,713 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-03 02:44:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-03 02:44:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2829, Invalid=11933, Unknown=0, NotChecked=0, Total=14762 [2022-11-03 02:44:38,718 INFO L87 Difference]: Start difference. First operand 219 states and 338 transitions. Second operand has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11)