./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P --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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:48:18,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:48:18,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:48:18,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:48:18,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:48:18,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:48:18,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:48:18,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:48:18,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:48:18,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:48:18,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:48:18,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:48:18,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:48:18,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:48:18,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:48:18,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:48:18,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:48:18,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:48:18,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:48:18,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:48:18,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:48:18,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:48:18,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:48:18,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:48:18,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:48:18,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:48:18,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:48:18,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:48:18,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:48:18,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:48:18,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:48:18,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:48:18,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:48:18,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:48:18,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:48:18,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:48:18,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:48:18,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:48:18,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:48:18,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:48:18,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:48:18,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 22:48:18,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:48:18,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:48:18,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:48:18,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:48:18,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:48:18,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:48:18,964 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:48:18,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:48:18,965 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:48:18,965 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:48:18,966 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:48:18,966 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:48:18,967 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:48:18,967 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:48:18,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:48:18,967 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:48:18,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:48:18,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:48:18,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:48:18,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:48:18,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:48:18,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:48:18,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:48:18,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:48:18,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:48:18,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:48:18,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:48:18,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:48:18,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:48:18,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:18,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:48:18,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:48:18,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:48:18,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:48:18,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:48:18,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:48:18,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:48:18,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:48:18,976 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_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-20 22:48:19,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:48:19,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:48:19,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:48:19,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:48:19,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:48:19,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-20 22:48:19,356 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/data/cb9fedd98/6d9ebe5d371a4ddfaef133d6900f1803/FLAG63c9b6f4e [2021-11-20 22:48:20,144 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:48:20,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-20 22:48:20,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/data/cb9fedd98/6d9ebe5d371a4ddfaef133d6900f1803/FLAG63c9b6f4e [2021-11-20 22:48:20,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/data/cb9fedd98/6d9ebe5d371a4ddfaef133d6900f1803 [2021-11-20 22:48:20,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:48:20,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:48:20,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:20,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:48:20,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:48:20,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:20" (1/1) ... [2021-11-20 22:48:20,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3913ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:20, skipping insertion in model container [2021-11-20 22:48:20,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:48:20" (1/1) ... [2021-11-20 22:48:20,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:48:20,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:48:21,607 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_0af93d6c-fa82-4834-bf65-7edf41bc862b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-20 22:48:21,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:21,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:48:22,040 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_0af93d6c-fa82-4834-bf65-7edf41bc862b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-20 22:48:22,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:48:22,158 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:48:22,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22 WrapperNode [2021-11-20 22:48:22,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:48:22,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:22,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:48:22,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:48:22,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,274 INFO L137 Inliner]: procedures = 88, calls = 403, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1034 [2021-11-20 22:48:22,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:48:22,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:48:22,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:48:22,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:48:22,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:48:22,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:48:22,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:48:22,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:48:22,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (1/1) ... [2021-11-20 22:48:22,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:48:22,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:22,443 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:48:22,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:48:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-11-20 22:48:22,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-11-20 22:48:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:48:22,493 INFO L130 BoogieDeclarations]: Found specification of procedure load_pkt [2021-11-20 22:48:22,494 INFO L138 BoogieDeclarations]: Found implementation of procedure load_pkt [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 22:48:22,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 22:48:22,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 22:48:22,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:48:22,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:48:22,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-20 22:48:22,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-20 22:48:22,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 22:48:22,495 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 22:48:22,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 22:48:22,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 22:48:22,496 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2021-11-20 22:48:22,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2021-11-20 22:48:22,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:48:22,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 22:48:22,496 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-20 22:48:22,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-20 22:48:22,496 INFO L130 BoogieDeclarations]: Found specification of procedure type_trans [2021-11-20 22:48:22,497 INFO L138 BoogieDeclarations]: Found implementation of procedure type_trans [2021-11-20 22:48:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-20 22:48:22,497 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-20 22:48:22,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:48:22,498 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 22:48:22,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 22:48:22,498 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 22:48:22,498 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 22:48:22,498 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 22:48:22,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-20 22:48:22,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 22:48:22,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 22:48:22,499 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-20 22:48:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-20 22:48:22,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:48:22,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:48:22,893 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:48:22,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:48:23,270 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 22:48:24,152 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:48:24,434 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:48:24,435 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 22:48:24,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:24 BoogieIcfgContainer [2021-11-20 22:48:24,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:48:24,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:48:24,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:48:24,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:48:24,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:48:20" (1/3) ... [2021-11-20 22:48:24,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df1fb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:24, skipping insertion in model container [2021-11-20 22:48:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:48:22" (2/3) ... [2021-11-20 22:48:24,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df1fb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:48:24, skipping insertion in model container [2021-11-20 22:48:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:48:24" (3/3) ... [2021-11-20 22:48:24,448 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-20 22:48:24,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:48:24,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:48:24,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:48:24,532 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 [2021-11-20 22:48:24,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:48:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 148 states have (on average 1.445945945945946) internal successors, (214), 153 states have internal predecessors, (214), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-20 22:48:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 22:48:24,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:24,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:24,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 875927867, now seen corresponding path program 1 times [2021-11-20 22:48:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:24,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456013658] [2021-11-20 22:48:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:24,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:24,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456013658] [2021-11-20 22:48:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456013658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:24,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:24,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:24,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437389824] [2021-11-20 22:48:24,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:25,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:25,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:25,040 INFO L87 Difference]: Start difference. First operand has 210 states, 148 states have (on average 1.445945945945946) internal successors, (214), 153 states have internal predecessors, (214), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:48:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:25,822 INFO L93 Difference]: Finished difference Result 608 states and 887 transitions. [2021-11-20 22:48:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 22:48:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:25,839 INFO L225 Difference]: With dead ends: 608 [2021-11-20 22:48:25,839 INFO L226 Difference]: Without dead ends: 392 [2021-11-20 22:48:25,845 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 [2021-11-20 22:48:25,848 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 268 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:25,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 532 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 22:48:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-20 22:48:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-11-20 22:48:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 283 states have (on average 1.392226148409894) internal successors, (394), 283 states have internal predecessors, (394), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-11-20 22:48:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 553 transitions. [2021-11-20 22:48:25,934 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 553 transitions. Word has length 18 [2021-11-20 22:48:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:25,934 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 553 transitions. [2021-11-20 22:48:25,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:48:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 553 transitions. [2021-11-20 22:48:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 22:48:25,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:25,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:25,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:48:25,938 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 143795508, now seen corresponding path program 1 times [2021-11-20 22:48:25,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755081427] [2021-11-20 22:48:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:25,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:26,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755081427] [2021-11-20 22:48:26,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755081427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:26,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:26,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:26,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809369] [2021-11-20 22:48:26,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:26,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:26,047 INFO L87 Difference]: Start difference. First operand 392 states and 553 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:48:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:26,363 INFO L93 Difference]: Finished difference Result 779 states and 1098 transitions. [2021-11-20 22:48:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-20 22:48:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:26,368 INFO L225 Difference]: With dead ends: 779 [2021-11-20 22:48:26,368 INFO L226 Difference]: Without dead ends: 391 [2021-11-20 22:48:26,371 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 [2021-11-20 22:48:26,373 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:26,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 237 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:48:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-20 22:48:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2021-11-20 22:48:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 282 states have (on average 1.3829787234042554) internal successors, (390), 282 states have internal predecessors, (390), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-11-20 22:48:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 549 transitions. [2021-11-20 22:48:26,427 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 549 transitions. Word has length 21 [2021-11-20 22:48:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 549 transitions. [2021-11-20 22:48:26,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:48:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 549 transitions. [2021-11-20 22:48:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 22:48:26,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:26,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:26,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:48:26,438 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1063983033, now seen corresponding path program 1 times [2021-11-20 22:48:26,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:26,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858394311] [2021-11-20 22:48:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:26,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 22:48:26,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858394311] [2021-11-20 22:48:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858394311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:26,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:26,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:48:26,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010112690] [2021-11-20 22:48:26,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:48:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:48:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:48:26,649 INFO L87 Difference]: Start difference. First operand 391 states and 549 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 22:48:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:27,562 INFO L93 Difference]: Finished difference Result 778 states and 1104 transitions. [2021-11-20 22:48:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:48:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-20 22:48:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:27,577 INFO L225 Difference]: With dead ends: 778 [2021-11-20 22:48:27,578 INFO L226 Difference]: Without dead ends: 773 [2021-11-20 22:48:27,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:27,586 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 262 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:27,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 801 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 22:48:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-20 22:48:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 765. [2021-11-20 22:48:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 550 states have (on average 1.3854545454545455) internal successors, (762), 550 states have internal predecessors, (762), 158 states have call successors, (158), 57 states have call predecessors, (158), 56 states have return successors, (169), 157 states have call predecessors, (169), 157 states have call successors, (169) [2021-11-20 22:48:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1089 transitions. [2021-11-20 22:48:27,668 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1089 transitions. Word has length 39 [2021-11-20 22:48:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:27,669 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1089 transitions. [2021-11-20 22:48:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 22:48:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1089 transitions. [2021-11-20 22:48:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 22:48:27,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:27,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:27,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:48:27,682 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1185351831, now seen corresponding path program 1 times [2021-11-20 22:48:27,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811488902] [2021-11-20 22:48:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:27,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:27,814 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811488902] [2021-11-20 22:48:27,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811488902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:27,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:27,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:27,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326862040] [2021-11-20 22:48:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:27,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:27,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:27,817 INFO L87 Difference]: Start difference. First operand 765 states and 1089 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 22:48:28,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:28,408 INFO L93 Difference]: Finished difference Result 1208 states and 1716 transitions. [2021-11-20 22:48:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:28,408 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2021-11-20 22:48:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:28,412 INFO L225 Difference]: With dead ends: 1208 [2021-11-20 22:48:28,412 INFO L226 Difference]: Without dead ends: 447 [2021-11-20 22:48:28,414 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 [2021-11-20 22:48:28,415 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 34 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:28,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 466 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:48:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-11-20 22:48:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2021-11-20 22:48:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 326 states have (on average 1.3895705521472392) internal successors, (453), 326 states have internal predecessors, (453), 83 states have call successors, (83), 31 states have call predecessors, (83), 30 states have return successors, (88), 82 states have call predecessors, (88), 82 states have call successors, (88) [2021-11-20 22:48:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 624 transitions. [2021-11-20 22:48:28,443 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 624 transitions. Word has length 84 [2021-11-20 22:48:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:28,443 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 624 transitions. [2021-11-20 22:48:28,444 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 22:48:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 624 transitions. [2021-11-20 22:48:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 22:48:28,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:28,446 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:48:28,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1266665548, now seen corresponding path program 1 times [2021-11-20 22:48:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558907723] [2021-11-20 22:48:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:28,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 22:48:28,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558907723] [2021-11-20 22:48:28,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558907723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:28,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:28,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:48:28,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214299212] [2021-11-20 22:48:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:28,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:48:28,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:48:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:28,620 INFO L87 Difference]: Start difference. First operand 440 states and 624 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:29,435 INFO L93 Difference]: Finished difference Result 869 states and 1246 transitions. [2021-11-20 22:48:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:48:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 80 [2021-11-20 22:48:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:29,440 INFO L225 Difference]: With dead ends: 869 [2021-11-20 22:48:29,440 INFO L226 Difference]: Without dead ends: 454 [2021-11-20 22:48:29,441 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 [2021-11-20 22:48:29,442 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 2 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:29,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 943 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 22:48:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-20 22:48:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2021-11-20 22:48:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 333 states have (on average 1.3813813813813813) internal successors, (460), 334 states have internal predecessors, (460), 83 states have call successors, (83), 31 states have call predecessors, (83), 33 states have return successors, (95), 84 states have call predecessors, (95), 82 states have call successors, (95) [2021-11-20 22:48:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 638 transitions. [2021-11-20 22:48:29,474 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 638 transitions. Word has length 80 [2021-11-20 22:48:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 638 transitions. [2021-11-20 22:48:29,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-20 22:48:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 638 transitions. [2021-11-20 22:48:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 22:48:29,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:29,478 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:29,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:48:29,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1602010783, now seen corresponding path program 1 times [2021-11-20 22:48:29,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:29,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971287485] [2021-11-20 22:48:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:29,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 22:48:29,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:29,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971287485] [2021-11-20 22:48:29,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971287485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:29,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:29,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 22:48:29,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68738566] [2021-11-20 22:48:29,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:29,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:48:29,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:48:29,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:48:29,611 INFO L87 Difference]: Start difference. First operand 450 states and 638 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:48:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:31,073 INFO L93 Difference]: Finished difference Result 891 states and 1275 transitions. [2021-11-20 22:48:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:48:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2021-11-20 22:48:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:31,078 INFO L225 Difference]: With dead ends: 891 [2021-11-20 22:48:31,078 INFO L226 Difference]: Without dead ends: 466 [2021-11-20 22:48:31,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:48:31,082 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 10 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:31,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 1944 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 22:48:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-11-20 22:48:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 460. [2021-11-20 22:48:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 340 states have (on average 1.3676470588235294) internal successors, (465), 341 states have internal predecessors, (465), 84 states have call successors, (84), 31 states have call predecessors, (84), 35 states have return successors, (99), 87 states have call predecessors, (99), 83 states have call successors, (99) [2021-11-20 22:48:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 648 transitions. [2021-11-20 22:48:31,126 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 648 transitions. Word has length 84 [2021-11-20 22:48:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:31,127 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 648 transitions. [2021-11-20 22:48:31,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:48:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 648 transitions. [2021-11-20 22:48:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 22:48:31,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:31,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:31,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:48:31,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:31,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1548826003, now seen corresponding path program 1 times [2021-11-20 22:48:31,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:31,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615678776] [2021-11-20 22:48:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:31,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 22:48:31,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:31,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615678776] [2021-11-20 22:48:31,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615678776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:31,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:31,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:31,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227792870] [2021-11-20 22:48:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:31,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:31,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:31,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:31,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:31,305 INFO L87 Difference]: Start difference. First operand 460 states and 648 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:48:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:31,808 INFO L93 Difference]: Finished difference Result 909 states and 1284 transitions. [2021-11-20 22:48:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 90 [2021-11-20 22:48:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:31,813 INFO L225 Difference]: With dead ends: 909 [2021-11-20 22:48:31,813 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 22:48:31,814 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 [2021-11-20 22:48:31,815 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 0 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:31,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 476 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:48:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 22:48:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-11-20 22:48:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 341 states have (on average 1.3665689149560116) internal successors, (466), 342 states have internal predecessors, (466), 84 states have call successors, (84), 31 states have call predecessors, (84), 35 states have return successors, (99), 87 states have call predecessors, (99), 83 states have call successors, (99) [2021-11-20 22:48:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 649 transitions. [2021-11-20 22:48:31,846 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 649 transitions. Word has length 90 [2021-11-20 22:48:31,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:31,846 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 649 transitions. [2021-11-20 22:48:31,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 22:48:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 649 transitions. [2021-11-20 22:48:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-20 22:48:31,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:31,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:31,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:48:31,849 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash -130722288, now seen corresponding path program 1 times [2021-11-20 22:48:31,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:31,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696643315] [2021-11-20 22:48:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:31,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 22:48:32,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696643315] [2021-11-20 22:48:32,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696643315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:32,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:32,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 22:48:32,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054401262] [2021-11-20 22:48:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:32,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 22:48:32,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:32,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 22:48:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:48:32,404 INFO L87 Difference]: Start difference. First operand 461 states and 649 transitions. Second operand has 14 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:36,712 INFO L93 Difference]: Finished difference Result 1071 states and 1542 transitions. [2021-11-20 22:48:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 22:48:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 91 [2021-11-20 22:48:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:36,718 INFO L225 Difference]: With dead ends: 1071 [2021-11-20 22:48:36,718 INFO L226 Difference]: Without dead ends: 636 [2021-11-20 22:48:36,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:48:36,720 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 90 mSDsluCounter, 4497 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 4150 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:36,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 4150 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 22:48:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-20 22:48:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 469. [2021-11-20 22:48:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 347 states have (on average 1.3602305475504324) internal successors, (472), 347 states have internal predecessors, (472), 85 states have call successors, (85), 31 states have call predecessors, (85), 36 states have return successors, (102), 90 states have call predecessors, (102), 84 states have call successors, (102) [2021-11-20 22:48:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 659 transitions. [2021-11-20 22:48:36,753 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 659 transitions. Word has length 91 [2021-11-20 22:48:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:36,753 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 659 transitions. [2021-11-20 22:48:36,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 659 transitions. [2021-11-20 22:48:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 22:48:36,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:36,756 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:36,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:48:36,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:36,757 INFO L85 PathProgramCache]: Analyzing trace with hash -915730903, now seen corresponding path program 1 times [2021-11-20 22:48:36,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:36,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332504890] [2021-11-20 22:48:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:36,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 22:48:37,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:37,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332504890] [2021-11-20 22:48:37,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332504890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:37,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:37,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 22:48:37,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706857259] [2021-11-20 22:48:37,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 22:48:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 22:48:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:48:37,327 INFO L87 Difference]: Start difference. First operand 469 states and 659 transitions. Second operand has 14 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:39,985 INFO L93 Difference]: Finished difference Result 934 states and 1318 transitions. [2021-11-20 22:48:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 22:48:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 95 [2021-11-20 22:48:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:39,989 INFO L225 Difference]: With dead ends: 934 [2021-11-20 22:48:39,989 INFO L226 Difference]: Without dead ends: 491 [2021-11-20 22:48:39,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:48:39,994 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 14 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:39,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 3280 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 22:48:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-20 22:48:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 473. [2021-11-20 22:48:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 351 states have (on average 1.3561253561253561) internal successors, (476), 349 states have internal predecessors, (476), 85 states have call successors, (85), 31 states have call predecessors, (85), 36 states have return successors, (102), 92 states have call predecessors, (102), 84 states have call successors, (102) [2021-11-20 22:48:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 663 transitions. [2021-11-20 22:48:40,023 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 663 transitions. Word has length 95 [2021-11-20 22:48:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:40,024 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 663 transitions. [2021-11-20 22:48:40,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 4 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 22:48:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 663 transitions. [2021-11-20 22:48:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 22:48:40,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:40,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:40,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:48:40,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1453181594, now seen corresponding path program 1 times [2021-11-20 22:48:40,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:40,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439103389] [2021-11-20 22:48:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:40,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:48:40,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439103389] [2021-11-20 22:48:40,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439103389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:40,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:40,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:40,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55305098] [2021-11-20 22:48:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:40,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:40,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:40,140 INFO L87 Difference]: Start difference. First operand 473 states and 663 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 22:48:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:40,654 INFO L93 Difference]: Finished difference Result 705 states and 993 transitions. [2021-11-20 22:48:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:40,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 96 [2021-11-20 22:48:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:40,659 INFO L225 Difference]: With dead ends: 705 [2021-11-20 22:48:40,659 INFO L226 Difference]: Without dead ends: 477 [2021-11-20 22:48:40,660 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 [2021-11-20 22:48:40,660 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 4 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:40,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 470 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:48:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-20 22:48:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2021-11-20 22:48:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 354 states have (on average 1.3531073446327684) internal successors, (479), 353 states have internal predecessors, (479), 85 states have call successors, (85), 31 states have call predecessors, (85), 37 states have return successors, (103), 92 states have call predecessors, (103), 84 states have call successors, (103) [2021-11-20 22:48:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 667 transitions. [2021-11-20 22:48:40,687 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 667 transitions. Word has length 96 [2021-11-20 22:48:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:40,688 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 667 transitions. [2021-11-20 22:48:40,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 22:48:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 667 transitions. [2021-11-20 22:48:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 22:48:40,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:40,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:40,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:48:40,691 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:40,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1302252283, now seen corresponding path program 1 times [2021-11-20 22:48:40,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:40,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810474966] [2021-11-20 22:48:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:40,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:48:40,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:40,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810474966] [2021-11-20 22:48:40,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810474966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:40,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:40,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 22:48:40,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797555507] [2021-11-20 22:48:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:40,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:48:40,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:48:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:48:40,905 INFO L87 Difference]: Start difference. First operand 477 states and 667 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 22:48:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:42,697 INFO L93 Difference]: Finished difference Result 945 states and 1325 transitions. [2021-11-20 22:48:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:48:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-20 22:48:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:42,706 INFO L225 Difference]: With dead ends: 945 [2021-11-20 22:48:42,706 INFO L226 Difference]: Without dead ends: 494 [2021-11-20 22:48:42,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:48:42,708 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 577 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:42,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 810 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 22:48:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-20 22:48:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 482. [2021-11-20 22:48:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 357 states have (on average 1.341736694677871) internal successors, (479), 356 states have internal predecessors, (479), 86 states have call successors, (86), 31 states have call predecessors, (86), 38 states have return successors, (103), 94 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-20 22:48:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 668 transitions. [2021-11-20 22:48:42,736 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 668 transitions. Word has length 97 [2021-11-20 22:48:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:42,736 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 668 transitions. [2021-11-20 22:48:42,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 22:48:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 668 transitions. [2021-11-20 22:48:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 22:48:42,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:42,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:48:42,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1574238282, now seen corresponding path program 1 times [2021-11-20 22:48:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664475148] [2021-11-20 22:48:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:42,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:42,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664475148] [2021-11-20 22:48:42,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664475148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:42,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:42,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:48:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305063607] [2021-11-20 22:48:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:42,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:48:42,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:48:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:42,853 INFO L87 Difference]: Start difference. First operand 482 states and 668 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 22:48:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:43,561 INFO L93 Difference]: Finished difference Result 1089 states and 1543 transitions. [2021-11-20 22:48:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:48:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2021-11-20 22:48:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:43,567 INFO L225 Difference]: With dead ends: 1089 [2021-11-20 22:48:43,567 INFO L226 Difference]: Without dead ends: 633 [2021-11-20 22:48:43,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:48:43,569 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 80 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:43,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 563 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 22:48:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-20 22:48:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 478. [2021-11-20 22:48:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 355 states have (on average 1.3380281690140845) internal successors, (475), 354 states have internal predecessors, (475), 84 states have call successors, (84), 31 states have call predecessors, (84), 38 states have return successors, (101), 92 states have call predecessors, (101), 83 states have call successors, (101) [2021-11-20 22:48:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 660 transitions. [2021-11-20 22:48:43,600 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 660 transitions. Word has length 116 [2021-11-20 22:48:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:43,600 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 660 transitions. [2021-11-20 22:48:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 22:48:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 660 transitions. [2021-11-20 22:48:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 22:48:43,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:43,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:43,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 22:48:43,604 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1724188082, now seen corresponding path program 1 times [2021-11-20 22:48:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:43,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272347293] [2021-11-20 22:48:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:43,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:43,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272347293] [2021-11-20 22:48:43,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272347293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:48:43,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:48:43,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:48:43,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599129920] [2021-11-20 22:48:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:43,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:48:43,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:48:43,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:48:43,869 INFO L87 Difference]: Start difference. First operand 478 states and 660 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 22:48:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:45,348 INFO L93 Difference]: Finished difference Result 1091 states and 1547 transitions. [2021-11-20 22:48:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:48:45,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2021-11-20 22:48:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:45,354 INFO L225 Difference]: With dead ends: 1091 [2021-11-20 22:48:45,354 INFO L226 Difference]: Without dead ends: 639 [2021-11-20 22:48:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:48:45,356 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 83 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:45,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1186 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 22:48:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-20 22:48:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 484. [2021-11-20 22:48:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 359 states have (on average 1.3454038997214484) internal successors, (483), 360 states have internal predecessors, (483), 84 states have call successors, (84), 31 states have call predecessors, (84), 40 states have return successors, (105), 92 states have call predecessors, (105), 83 states have call successors, (105) [2021-11-20 22:48:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 672 transitions. [2021-11-20 22:48:45,388 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 672 transitions. Word has length 116 [2021-11-20 22:48:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:45,389 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 672 transitions. [2021-11-20 22:48:45,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 22:48:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 672 transitions. [2021-11-20 22:48:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 22:48:45,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:45,392 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:45,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 22:48:45,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -318579255, now seen corresponding path program 1 times [2021-11-20 22:48:45,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503658409] [2021-11-20 22:48:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:45,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:45,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503658409] [2021-11-20 22:48:45,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503658409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:45,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473120494] [2021-11-20 22:48:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:45,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:45,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:45,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:45,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:48:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:45,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:48:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:46,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:46,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473120494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:46,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:48:46,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2021-11-20 22:48:46,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720941643] [2021-11-20 22:48:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:48:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:48:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:48:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:48:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:48:46,643 INFO L87 Difference]: Start difference. First operand 484 states and 672 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 22:48:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:47,230 INFO L93 Difference]: Finished difference Result 948 states and 1330 transitions. [2021-11-20 22:48:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:48:47,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-20 22:48:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:47,235 INFO L225 Difference]: With dead ends: 948 [2021-11-20 22:48:47,235 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 22:48:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:48:47,237 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 2 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:47,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 462 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:48:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 22:48:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 486. [2021-11-20 22:48:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 361 states have (on average 1.3434903047091413) internal successors, (485), 362 states have internal predecessors, (485), 84 states have call successors, (84), 31 states have call predecessors, (84), 40 states have return successors, (105), 92 states have call predecessors, (105), 83 states have call successors, (105) [2021-11-20 22:48:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 674 transitions. [2021-11-20 22:48:47,266 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 674 transitions. Word has length 117 [2021-11-20 22:48:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:47,267 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 674 transitions. [2021-11-20 22:48:47,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 22:48:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 674 transitions. [2021-11-20 22:48:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 22:48:47,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:47,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:48:47,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:47,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 22:48:47,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash -719785516, now seen corresponding path program 1 times [2021-11-20 22:48:47,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311364221] [2021-11-20 22:48:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:47,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:48:47,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311364221] [2021-11-20 22:48:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311364221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148047472] [2021-11-20 22:48:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:47,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:47,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:47,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0af93d6c-fa82-4834-bf65-7edf41bc862b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:48:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:48:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 22:48:48,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:48:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 22:48:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148047472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:48:49,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613394756] [2021-11-20 22:48:49,172 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-20 22:48:49,172 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:48:49,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:48:49,182 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:48:49,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:48:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:50,305 INFO L354 Elim1Store]: treesize reduction 300, result has 47.5 percent of original size [2021-11-20 22:48:50,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 466 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 30 case distinctions, treesize of input 162 treesize of output 374 [2021-11-20 22:48:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:48:51,778 INFO L354 Elim1Store]: treesize reduction 540, result has 33.4 percent of original size [2021-11-20 22:48:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 33 select indices, 33 select index equivalence classes, 498 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 60 case distinctions, treesize of input 172 treesize of output 385 [2021-11-20 22:48:52,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-20 22:48:52,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2021-11-20 22:48:53,142 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2021-11-20 22:48:53,152 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2021-11-20 22:48:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 22:48:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:48:53,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:48:54,447 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2021-11-20 22:48:55,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:56,068 INFO L354 Elim1Store]: treesize reduction 16, result has 52.9 percent of original size [2021-11-20 22:48:56,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 59 [2021-11-20 22:48:56,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2021-11-20 22:48:56,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2021-11-20 22:48:56,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:57,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:48:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:48:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-20 22:49:02,652 INFO L354 Elim1Store]: treesize reduction 520, result has 8.1 percent of original size [2021-11-20 22:49:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 55 [2021-11-20 22:49:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 76 [2021-11-20 22:49:02,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:02,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 29 [2021-11-20 22:49:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 22:49:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:03,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 55 [2021-11-20 22:49:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 78 [2021-11-20 22:49:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2021-11-20 22:49:35,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:35,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-11-20 22:49:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 22:49:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 22:49:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-11-20 22:49:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,078 INFO L354 Elim1Store]: treesize reduction 73, result has 34.8 percent of original size [2021-11-20 22:49:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 61 [2021-11-20 22:49:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,121 INFO L354 Elim1Store]: treesize reduction 100, result has 10.7 percent of original size [2021-11-20 22:49:39,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2021-11-20 22:49:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-20 22:49:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:39,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:49:39,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 89 treesize of output 37 [2021-11-20 22:49:50,030 WARN L227 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 4442 DAG size of output: 4369 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)