./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V --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 64bit --witnessprinter.graph.data.programhash 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:13:59,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:13:59,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:13:59,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:13:59,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:13:59,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:13:59,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:13:59,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:13:59,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:13:59,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:13:59,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:13:59,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:13:59,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:13:59,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:13:59,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:13:59,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:13:59,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:13:59,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:13:59,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:13:59,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:13:59,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:13:59,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:13:59,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:13:59,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:13:59,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:13:59,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:13:59,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:13:59,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:13:59,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:13:59,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:13:59,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:13:59,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:13:59,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:13:59,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:13:59,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:13:59,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:13:59,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:13:59,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:13:59,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:13:59,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:13:59,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:13:59,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:13:59,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:13:59,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:13:59,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:13:59,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:13:59,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:13:59,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:13:59,754 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:13:59,754 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:13:59,755 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:13:59,755 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:13:59,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:13:59,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:13:59,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:13:59,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:13:59,758 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:13:59,758 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:13:59,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:13:59,759 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:13:59,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:13:59,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:13:59,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:13:59,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:13:59,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:13:59,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:13:59,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:13:59,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:13:59,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:13:59,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:13:59,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:13:59,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:13:59,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:13:59,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:13:59,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:13:59,766 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:13:59,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:13:59,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:13:59,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:13:59,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:13:59,772 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 [2021-11-23 03:14:00,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:14:00,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:14:00,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:14:00,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:14:00,201 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:14:00,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-23 03:14:00,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/data/67a9a170b/f3e8e55ceb814fb28ff57308acfd863d/FLAG179ea4464 [2021-11-23 03:14:01,359 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:14:01,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-23 03:14:01,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/data/67a9a170b/f3e8e55ceb814fb28ff57308acfd863d/FLAG179ea4464 [2021-11-23 03:14:01,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/data/67a9a170b/f3e8e55ceb814fb28ff57308acfd863d [2021-11-23 03:14:01,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:14:01,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:14:01,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:14:01,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:14:01,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:14:01,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:01" (1/1) ... [2021-11-23 03:14:01,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c42cf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:01, skipping insertion in model container [2021-11-23 03:14:01,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:01" (1/1) ... [2021-11-23 03:14:01,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:14:01,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:14:04,538 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_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2021-11-23 03:14:04,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:14:04,814 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:14:05,397 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_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2021-11-23 03:14:05,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:14:05,673 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:14:05,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05 WrapperNode [2021-11-23 03:14:05,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:14:05,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:14:05,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:14:05,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:14:05,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:05,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,087 INFO L137 Inliner]: procedures = 303, calls = 3661, calls flagged for inlining = 138, calls inlined = 95, statements flattened = 4833 [2021-11-23 03:14:06,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:14:06,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:14:06,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:14:06,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:14:06,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:14:06,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:14:06,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:14:06,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:14:06,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (1/1) ... [2021-11-23 03:14:06,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:14:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:14:06,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:14:06,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:14:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure rio_uevent [2021-11-23 03:14:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_uevent [2021-11-23 03:14:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2021-11-23 03:14:06,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2021-11-23 03:14:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:14:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:14:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:14:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:14:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:14:06,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:14:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-23 03:14:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-23 03:14:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-23 03:14:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-23 03:14:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 03:14:06,648 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 03:14:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:14:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:14:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:14:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:14:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_16 [2021-11-23 03:14:06,649 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_16 [2021-11-23 03:14:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 03:14:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 03:14:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:14:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:14:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_remove [2021-11-23 03:14:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_remove [2021-11-23 03:14:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:14:06,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:14:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure bus_scan_store [2021-11-23 03:14:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_scan_store [2021-11-23 03:14:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:14:06,651 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:14:06,651 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-23 03:14:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-23 03:14:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure disc_work_handler [2021-11-23 03:14:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure disc_work_handler [2021-11-23 03:14:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:14:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_put [2021-11-23 03:14:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_put [2021-11-23 03:14:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:14:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-23 03:14:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-23 03:14:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:14:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:14:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_16 [2021-11-23 03:14:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_16 [2021-11-23 03:14:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:14:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:14:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_read_config_32 [2021-11-23 03:14:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_read_config_32 [2021-11-23 03:14:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_write_config_32 [2021-11-23 03:14:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_write_config_32 [2021-11-23 03:14:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 03:14:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 03:14:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:14:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:14:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure rio_name [2021-11-23 03:14:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_name [2021-11-23 03:14:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:14:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:14:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_probe [2021-11-23 03:14:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_probe [2021-11-23 03:14:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:14:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:14:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_32 [2021-11-23 03:14:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_32 [2021-11-23 03:14:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-23 03:14:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-23 03:14:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:14:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2021-11-23 03:14:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2021-11-23 03:14:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_get [2021-11-23 03:14:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_get [2021-11-23 03:14:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:14:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:14:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:14:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:14:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:14:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:14:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:14:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:14:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:14:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:14:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:14:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:14:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:14:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure release_resource [2021-11-23 03:14:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resource [2021-11-23 03:14:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_8 [2021-11-23 03:14:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_8 [2021-11-23 03:14:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_bus [2021-11-23 03:14:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_bus [2021-11-23 03:14:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_32 [2021-11-23 03:14:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_32 [2021-11-23 03:14:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-23 03:14:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-23 03:14:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_device [2021-11-23 03:14:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_device [2021-11-23 03:14:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 03:14:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 03:14:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_8 [2021-11-23 03:14:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_8 [2021-11-23 03:14:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:14:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:14:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:14:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2021-11-23 03:14:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2021-11-23 03:14:07,626 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:14:07,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:14:07,935 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:14:14,019 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:14:14,911 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:14:14,912 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:14:14,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:14 BoogieIcfgContainer [2021-11-23 03:14:14,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:14:14,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:14:14,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:14:14,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:14:14,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:14:01" (1/3) ... [2021-11-23 03:14:14,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e6c952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:14, skipping insertion in model container [2021-11-23 03:14:14,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:05" (2/3) ... [2021-11-23 03:14:14,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e6c952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:14, skipping insertion in model container [2021-11-23 03:14:14,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:14" (3/3) ... [2021-11-23 03:14:14,940 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-23 03:14:14,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:14:14,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:14:15,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:14:15,116 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:14:15,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:14:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2021-11-23 03:14:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 03:14:15,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:15,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-11-23 03:14:15,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1952398704, now seen corresponding path program 1 times [2021-11-23 03:14:15,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936258310] [2021-11-23 03:14:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:15,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:14:16,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936258310] [2021-11-23 03:14:16,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936258310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:16,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:16,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:16,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351727204] [2021-11-23 03:14:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:16,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:16,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:16,664 INFO L87 Difference]: Start difference. First operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 03:14:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:17,930 INFO L93 Difference]: Finished difference Result 2124 states and 3089 transitions. [2021-11-23 03:14:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2021-11-23 03:14:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:17,966 INFO L225 Difference]: With dead ends: 2124 [2021-11-23 03:14:17,966 INFO L226 Difference]: Without dead ends: 1369 [2021-11-23 03:14:17,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:17,983 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 983 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:17,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 2016 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:14:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-23 03:14:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1366. [2021-11-23 03:14:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 930 states have (on average 1.3483870967741935) internal successors, (1254), 947 states have internal predecessors, (1254), 343 states have call successors, (343), 93 states have call predecessors, (343), 92 states have return successors, (341), 339 states have call predecessors, (341), 341 states have call successors, (341) [2021-11-23 03:14:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1938 transitions. [2021-11-23 03:14:18,206 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1938 transitions. Word has length 64 [2021-11-23 03:14:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:18,207 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1938 transitions. [2021-11-23 03:14:18,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 03:14:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1938 transitions. [2021-11-23 03:14:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:14:18,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:18,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:14:18,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1046530533, now seen corresponding path program 1 times [2021-11-23 03:14:18,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615185261] [2021-11-23 03:14:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:18,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:14:19,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:19,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615185261] [2021-11-23 03:14:19,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615185261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:19,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:19,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:19,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302839132] [2021-11-23 03:14:19,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:19,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:19,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:19,044 INFO L87 Difference]: Start difference. First operand 1366 states and 1938 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:14:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:19,937 INFO L93 Difference]: Finished difference Result 2640 states and 3778 transitions. [2021-11-23 03:14:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-23 03:14:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:19,967 INFO L225 Difference]: With dead ends: 2640 [2021-11-23 03:14:19,968 INFO L226 Difference]: Without dead ends: 2635 [2021-11-23 03:14:19,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:19,973 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 899 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:19,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 1943 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:14:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-11-23 03:14:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2625. [2021-11-23 03:14:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 1792 states have (on average 1.3532366071428572) internal successors, (2425), 1833 states have internal predecessors, (2425), 656 states have call successors, (656), 179 states have call predecessors, (656), 176 states have return successors, (674), 640 states have call predecessors, (674), 654 states have call successors, (674) [2021-11-23 03:14:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3755 transitions. [2021-11-23 03:14:20,326 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3755 transitions. Word has length 67 [2021-11-23 03:14:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:20,327 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 3755 transitions. [2021-11-23 03:14:20,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:14:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3755 transitions. [2021-11-23 03:14:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 03:14:20,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:20,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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] [2021-11-23 03:14:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:14:20,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1362520148, now seen corresponding path program 1 times [2021-11-23 03:14:20,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:20,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059816849] [2021-11-23 03:14:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:20,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:14:20,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:20,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059816849] [2021-11-23 03:14:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059816849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:20,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:20,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:20,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724606581] [2021-11-23 03:14:20,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:20,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:20,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:20,784 INFO L87 Difference]: Start difference. First operand 2625 states and 3755 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:14:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:22,094 INFO L93 Difference]: Finished difference Result 7755 states and 11068 transitions. [2021-11-23 03:14:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:22,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-23 03:14:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:22,197 INFO L225 Difference]: With dead ends: 7755 [2021-11-23 03:14:22,197 INFO L226 Difference]: Without dead ends: 5139 [2021-11-23 03:14:22,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:22,227 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 934 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:22,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1905 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:14:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2021-11-23 03:14:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 5131. [2021-11-23 03:14:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 3498 states have (on average 1.349056603773585) internal successors, (4719), 3581 states have internal predecessors, (4719), 1280 states have call successors, (1280), 357 states have call predecessors, (1280), 352 states have return successors, (1316), 1248 states have call predecessors, (1316), 1278 states have call successors, (1316) [2021-11-23 03:14:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 7315 transitions. [2021-11-23 03:14:22,629 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 7315 transitions. Word has length 91 [2021-11-23 03:14:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:22,630 INFO L470 AbstractCegarLoop]: Abstraction has 5131 states and 7315 transitions. [2021-11-23 03:14:22,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:14:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 7315 transitions. [2021-11-23 03:14:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 03:14:22,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:22,636 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:22,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:14:22,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1827562928, now seen corresponding path program 1 times [2021-11-23 03:14:22,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:22,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098418532] [2021-11-23 03:14:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:22,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:14:23,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:23,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098418532] [2021-11-23 03:14:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098418532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:23,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:23,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930765605] [2021-11-23 03:14:23,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:23,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:23,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:23,066 INFO L87 Difference]: Start difference. First operand 5131 states and 7315 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:14:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:24,440 INFO L93 Difference]: Finished difference Result 14927 states and 21236 transitions. [2021-11-23 03:14:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-11-23 03:14:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:24,547 INFO L225 Difference]: With dead ends: 14927 [2021-11-23 03:14:24,548 INFO L226 Difference]: Without dead ends: 9805 [2021-11-23 03:14:24,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:24,585 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 919 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:24,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 2008 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:14:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2021-11-23 03:14:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9795. [2021-11-23 03:14:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9795 states, 6666 states have (on average 1.3427842784278428) internal successors, (8951), 6821 states have internal predecessors, (8951), 2448 states have call successors, (2448), 689 states have call predecessors, (2448), 680 states have return successors, (2518), 2388 states have call predecessors, (2518), 2446 states have call successors, (2518) [2021-11-23 03:14:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 13917 transitions. [2021-11-23 03:14:25,319 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 13917 transitions. Word has length 103 [2021-11-23 03:14:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 9795 states and 13917 transitions. [2021-11-23 03:14:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 03:14:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 13917 transitions. [2021-11-23 03:14:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 03:14:25,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:25,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:25,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:14:25,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1495776247, now seen corresponding path program 1 times [2021-11-23 03:14:25,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857572479] [2021-11-23 03:14:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:25,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 03:14:25,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:25,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857572479] [2021-11-23 03:14:25,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857572479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:25,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:25,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:25,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878533543] [2021-11-23 03:14:25,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:25,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:25,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:25,970 INFO L87 Difference]: Start difference. First operand 9795 states and 13917 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:14:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:27,644 INFO L93 Difference]: Finished difference Result 27061 states and 38366 transitions. [2021-11-23 03:14:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:27,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 130 [2021-11-23 03:14:27,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:27,827 INFO L225 Difference]: With dead ends: 27061 [2021-11-23 03:14:27,828 INFO L226 Difference]: Without dead ends: 17275 [2021-11-23 03:14:27,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:27,900 INFO L933 BasicCegarLoop]: 1163 mSDtfsCounter, 746 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:27,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 2032 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 03:14:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2021-11-23 03:14:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 17237. [2021-11-23 03:14:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17237 states, 11880 states have (on average 1.3411616161616162) internal successors, (15933), 12073 states have internal predecessors, (15933), 4196 states have call successors, (4196), 1169 states have call predecessors, (4196), 1160 states have return successors, (4274), 4122 states have call predecessors, (4274), 4194 states have call successors, (4274) [2021-11-23 03:14:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17237 states to 17237 states and 24403 transitions. [2021-11-23 03:14:29,091 INFO L78 Accepts]: Start accepts. Automaton has 17237 states and 24403 transitions. Word has length 130 [2021-11-23 03:14:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:29,092 INFO L470 AbstractCegarLoop]: Abstraction has 17237 states and 24403 transitions. [2021-11-23 03:14:29,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:14:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17237 states and 24403 transitions. [2021-11-23 03:14:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 03:14:29,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:29,107 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:29,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:14:29,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash 94572577, now seen corresponding path program 1 times [2021-11-23 03:14:29,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949691044] [2021-11-23 03:14:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:29,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-23 03:14:29,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949691044] [2021-11-23 03:14:29,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949691044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:29,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:29,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:29,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5414245] [2021-11-23 03:14:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:29,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:29,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:29,603 INFO L87 Difference]: Start difference. First operand 17237 states and 24403 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:14:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:31,291 INFO L93 Difference]: Finished difference Result 42915 states and 60778 transitions. [2021-11-23 03:14:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-11-23 03:14:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:31,440 INFO L225 Difference]: With dead ends: 42915 [2021-11-23 03:14:31,440 INFO L226 Difference]: Without dead ends: 25687 [2021-11-23 03:14:31,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:31,518 INFO L933 BasicCegarLoop]: 1458 mSDtfsCounter, 940 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2316 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:14:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2021-11-23 03:14:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 25679. [2021-11-23 03:14:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25679 states, 17758 states have (on average 1.3386079513458722) internal successors, (23771), 18037 states have internal predecessors, (23771), 6192 states have call successors, (6192), 1741 states have call predecessors, (6192), 1728 states have return successors, (6306), 6084 states have call predecessors, (6306), 6190 states have call successors, (6306) [2021-11-23 03:14:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25679 states to 25679 states and 36269 transitions. [2021-11-23 03:14:33,237 INFO L78 Accepts]: Start accepts. Automaton has 25679 states and 36269 transitions. Word has length 159 [2021-11-23 03:14:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:33,240 INFO L470 AbstractCegarLoop]: Abstraction has 25679 states and 36269 transitions. [2021-11-23 03:14:33,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:14:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 25679 states and 36269 transitions. [2021-11-23 03:14:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-23 03:14:33,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:33,263 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:33,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:14:33,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -648475835, now seen corresponding path program 1 times [2021-11-23 03:14:33,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759275245] [2021-11-23 03:14:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:33,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-23 03:14:33,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759275245] [2021-11-23 03:14:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759275245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:33,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:33,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:33,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576681250] [2021-11-23 03:14:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:33,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:33,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:33,791 INFO L87 Difference]: Start difference. First operand 25679 states and 36269 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:14:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:36,297 INFO L93 Difference]: Finished difference Result 63785 states and 90134 transitions. [2021-11-23 03:14:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 171 [2021-11-23 03:14:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:36,554 INFO L225 Difference]: With dead ends: 63785 [2021-11-23 03:14:36,554 INFO L226 Difference]: Without dead ends: 38115 [2021-11-23 03:14:36,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:36,639 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 926 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:36,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 2306 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:14:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38115 states. [2021-11-23 03:14:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38115 to 38097. [2021-11-23 03:14:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38097 states, 26440 states have (on average 1.3359682299546143) internal successors, (35323), 26837 states have internal predecessors, (35323), 9102 states have call successors, (9102), 2573 states have call predecessors, (9102), 2554 states have return successors, (9268), 8946 states have call predecessors, (9268), 9100 states have call successors, (9268) [2021-11-23 03:14:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38097 states to 38097 states and 53693 transitions. [2021-11-23 03:14:39,238 INFO L78 Accepts]: Start accepts. Automaton has 38097 states and 53693 transitions. Word has length 171 [2021-11-23 03:14:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:39,244 INFO L470 AbstractCegarLoop]: Abstraction has 38097 states and 53693 transitions. [2021-11-23 03:14:39,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-23 03:14:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 38097 states and 53693 transitions. [2021-11-23 03:14:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 03:14:39,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:39,264 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:14:39,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:14:39,265 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:39,266 INFO L85 PathProgramCache]: Analyzing trace with hash 402589493, now seen corresponding path program 1 times [2021-11-23 03:14:39,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:39,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035583193] [2021-11-23 03:14:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:39,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 03:14:40,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:40,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035583193] [2021-11-23 03:14:40,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035583193] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:40,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:40,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:14:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797077337] [2021-11-23 03:14:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:40,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:14:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:14:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:14:40,312 INFO L87 Difference]: Start difference. First operand 38097 states and 53693 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 03:14:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:44,445 INFO L93 Difference]: Finished difference Result 88699 states and 125164 transitions. [2021-11-23 03:14:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:14:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 176 [2021-11-23 03:14:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:44,986 INFO L225 Difference]: With dead ends: 88699 [2021-11-23 03:14:44,986 INFO L226 Difference]: Without dead ends: 50611 [2021-11-23 03:14:45,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:14:45,109 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 978 mSDsluCounter, 4782 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 5748 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:45,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 5748 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 03:14:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50611 states. [2021-11-23 03:14:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50611 to 50435. [2021-11-23 03:14:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 35026 states have (on average 1.3346371267058756) internal successors, (46747), 35565 states have internal predecessors, (46747), 12032 states have call successors, (12032), 3377 states have call predecessors, (12032), 3376 states have return successors, (12282), 11852 states have call predecessors, (12282), 12030 states have call successors, (12282) [2021-11-23 03:14:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 71061 transitions. [2021-11-23 03:14:48,391 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 71061 transitions. Word has length 176 [2021-11-23 03:14:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:48,392 INFO L470 AbstractCegarLoop]: Abstraction has 50435 states and 71061 transitions. [2021-11-23 03:14:48,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 03:14:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 71061 transitions. [2021-11-23 03:14:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 03:14:48,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:48,425 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 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, 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, 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] [2021-11-23 03:14:48,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:14:48,426 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1237735906, now seen corresponding path program 1 times [2021-11-23 03:14:48,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838296930] [2021-11-23 03:14:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:48,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-23 03:14:49,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838296930] [2021-11-23 03:14:49,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838296930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:49,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:14:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513489482] [2021-11-23 03:14:49,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:49,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:14:49,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:14:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:49,124 INFO L87 Difference]: Start difference. First operand 50435 states and 71061 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 03:14:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:51,625 INFO L93 Difference]: Finished difference Result 95829 states and 134829 transitions. [2021-11-23 03:14:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:14:51,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 198 [2021-11-23 03:14:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:51,898 INFO L225 Difference]: With dead ends: 95829 [2021-11-23 03:14:51,898 INFO L226 Difference]: Without dead ends: 45403 [2021-11-23 03:14:52,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:14:52,101 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 785 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:52,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 757 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:14:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45403 states. [2021-11-23 03:14:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45403 to 45343. [2021-11-23 03:14:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45343 states, 32066 states have (on average 1.3318468159421193) internal successors, (42707), 32257 states have internal predecessors, (42707), 10400 states have call successors, (10400), 2853 states have call predecessors, (10400), 2876 states have return successors, (10482), 10352 states have call predecessors, (10482), 10398 states have call successors, (10482) [2021-11-23 03:14:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45343 states to 45343 states and 63589 transitions. [2021-11-23 03:14:54,518 INFO L78 Accepts]: Start accepts. Automaton has 45343 states and 63589 transitions. Word has length 198 [2021-11-23 03:14:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:14:54,519 INFO L470 AbstractCegarLoop]: Abstraction has 45343 states and 63589 transitions. [2021-11-23 03:14:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 03:14:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 45343 states and 63589 transitions. [2021-11-23 03:14:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-23 03:14:54,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:14:54,559 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 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, 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, 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] [2021-11-23 03:14:54,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:14:54,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:14:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:14:54,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1185447967, now seen corresponding path program 1 times [2021-11-23 03:14:54,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:14:54,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67460817] [2021-11-23 03:14:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:14:54,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:14:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:14:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-23 03:14:55,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:14:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67460817] [2021-11-23 03:14:55,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67460817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:14:55,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:14:55,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:14:55,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097479422] [2021-11-23 03:14:55,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:14:55,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:14:55,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:14:55,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:14:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:14:55,379 INFO L87 Difference]: Start difference. First operand 45343 states and 63589 transitions. Second operand has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 03:14:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:14:58,315 INFO L93 Difference]: Finished difference Result 91061 states and 127981 transitions. [2021-11-23 03:14:58,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:14:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 204 [2021-11-23 03:14:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:14:58,538 INFO L225 Difference]: With dead ends: 91061 [2021-11-23 03:14:58,539 INFO L226 Difference]: Without dead ends: 45439 [2021-11-23 03:14:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:14:58,660 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 3 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3741 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:14:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3741 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:14:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-11-23 03:15:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 45439. [2021-11-23 03:15:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 32162 states have (on average 1.3308562900317145) internal successors, (42803), 32353 states have internal predecessors, (42803), 10400 states have call successors, (10400), 2853 states have call predecessors, (10400), 2876 states have return successors, (10482), 10352 states have call predecessors, (10482), 10398 states have call successors, (10482) [2021-11-23 03:15:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 63685 transitions. [2021-11-23 03:15:00,814 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 63685 transitions. Word has length 204 [2021-11-23 03:15:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:00,815 INFO L470 AbstractCegarLoop]: Abstraction has 45439 states and 63685 transitions. [2021-11-23 03:15:00,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 03:15:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 63685 transitions. [2021-11-23 03:15:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 03:15:00,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:00,855 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 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, 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, 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] [2021-11-23 03:15:00,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:15:00,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -819121465, now seen corresponding path program 1 times [2021-11-23 03:15:00,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783567074] [2021-11-23 03:15:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:00,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-23 03:15:02,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783567074] [2021-11-23 03:15:02,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783567074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764884881] [2021-11-23 03:15:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:02,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:02,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:02,033 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:02,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:15:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 6937 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:15:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-23 03:15:05,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:15:05,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764884881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:05,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:15:05,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2021-11-23 03:15:05,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275700922] [2021-11-23 03:15:05,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:05,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:15:05,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:05,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:15:05,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:15:05,643 INFO L87 Difference]: Start difference. First operand 45439 states and 63685 transitions. Second operand has 9 states, 8 states have (on average 9.5) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:15:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:16,766 INFO L93 Difference]: Finished difference Result 110031 states and 159917 transitions. [2021-11-23 03:15:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:15:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 205 [2021-11-23 03:15:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:17,141 INFO L225 Difference]: With dead ends: 110031 [2021-11-23 03:15:17,141 INFO L226 Difference]: Without dead ends: 110028 [2021-11-23 03:15:17,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:15:17,178 INFO L933 BasicCegarLoop]: 1726 mSDtfsCounter, 1896 mSDsluCounter, 5339 mSDsCounter, 0 mSdLazyCounter, 5863 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 6574 SdHoareTripleChecker+Invalid, 6582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 5863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:17,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2118 Valid, 6574 Invalid, 6582 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [719 Valid, 5863 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-23 03:15:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110028 states. [2021-11-23 03:15:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110028 to 68907. [2021-11-23 03:15:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68907 states, 48725 states have (on average 1.3278399179066187) internal successors, (64699), 49107 states have internal predecessors, (64699), 15657 states have call successors, (15657), 4333 states have call predecessors, (15657), 4524 states have return successors, (16127), 15646 states have call predecessors, (16127), 15655 states have call successors, (16127) [2021-11-23 03:15:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68907 states to 68907 states and 96483 transitions. [2021-11-23 03:15:22,706 INFO L78 Accepts]: Start accepts. Automaton has 68907 states and 96483 transitions. Word has length 205 [2021-11-23 03:15:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:22,707 INFO L470 AbstractCegarLoop]: Abstraction has 68907 states and 96483 transitions. [2021-11-23 03:15:22,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.5) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:15:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 68907 states and 96483 transitions. [2021-11-23 03:15:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 03:15:22,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:22,744 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:22,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:22,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ff4a34-71e4-4d6c-9e53-2fac6ceee5da/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:22,957 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash -65226658, now seen corresponding path program 1 times [2021-11-23 03:15:22,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:22,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980786557] [2021-11-23 03:15:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:22,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 03:15:24,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:24,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980786557] [2021-11-23 03:15:24,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980786557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:24,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:15:24,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447650326] [2021-11-23 03:15:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:15:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:15:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:15:24,018 INFO L87 Difference]: Start difference. First operand 68907 states and 96483 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 03:15:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:27,124 INFO L93 Difference]: Finished difference Result 138693 states and 194225 transitions. [2021-11-23 03:15:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:15:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 198 [2021-11-23 03:15:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:27,383 INFO L225 Difference]: With dead ends: 138693 [2021-11-23 03:15:27,384 INFO L226 Difference]: Without dead ends: 69795 [2021-11-23 03:15:27,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:15:27,592 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 4 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:27,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3041 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:15:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69795 states. [2021-11-23 03:15:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69795 to 69339. [2021-11-23 03:15:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69339 states, 49013 states have (on average 1.3259135331442677) internal successors, (64987), 49395 states have internal predecessors, (64987), 15729 states have call successors, (15729), 4333 states have call predecessors, (15729), 4596 states have return successors, (16343), 15790 states have call predecessors, (16343), 15727 states have call successors, (16343) [2021-11-23 03:15:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69339 states to 69339 states and 97059 transitions. [2021-11-23 03:15:30,895 INFO L78 Accepts]: Start accepts. Automaton has 69339 states and 97059 transitions. Word has length 198 [2021-11-23 03:15:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 69339 states and 97059 transitions. [2021-11-23 03:15:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 03:15:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 69339 states and 97059 transitions. [2021-11-23 03:15:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 03:15:30,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:30,920 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:15:30,921 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1007737186, now seen corresponding path program 1 times [2021-11-23 03:15:30,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:30,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589911016] [2021-11-23 03:15:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:30,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 03:15:32,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589911016] [2021-11-23 03:15:32,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589911016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:32,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:32,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 03:15:32,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481546618] [2021-11-23 03:15:32,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:32,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:15:32,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:15:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:15:32,754 INFO L87 Difference]: Start difference. First operand 69339 states and 97059 transitions. Second operand has 12 states, 10 states have (on average 9.0) internal successors, (90), 11 states have internal predecessors, (90), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-23 03:15:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:37,165 INFO L93 Difference]: Finished difference Result 141549 states and 198293 transitions. [2021-11-23 03:15:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:15:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 9.0) internal successors, (90), 11 states have internal predecessors, (90), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 199 [2021-11-23 03:15:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:37,380 INFO L225 Difference]: With dead ends: 141549 [2021-11-23 03:15:37,380 INFO L226 Difference]: Without dead ends: 72219 [2021-11-23 03:15:37,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:15:37,573 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 110 mSDsluCounter, 7413 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 7440 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:37,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 7440 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 03:15:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72219 states.