./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/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 484c71f67ef44adda28419ba4f7367133d47a44b7b25589681c020e12726250b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:38:09,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:38:09,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:38:09,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:38:09,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:38:09,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:38:09,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:38:09,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:38:09,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:38:09,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:38:09,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:38:09,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:38:09,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:38:09,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:38:09,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:38:09,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:38:09,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:38:09,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:38:09,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:38:09,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:38:09,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:38:09,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:38:09,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:38:09,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:38:09,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:38:09,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:38:10,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:38:10,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:38:10,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:38:10,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:38:10,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:38:10,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:38:10,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:38:10,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:38:10,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:38:10,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:38:10,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:38:10,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:38:10,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:38:10,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:38:10,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:38:10,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:38:10,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:38:10,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:38:10,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:38:10,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:38:10,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:38:10,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:38:10,063 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:38:10,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:38:10,063 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:38:10,063 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:38:10,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:38:10,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:38:10,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:38:10,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:38:10,065 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:38:10,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:38:10,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:38:10,066 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:38:10,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:38:10,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:38:10,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:38:10,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:38:10,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:38:10,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:38:10,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:38:10,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:38:10,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:38:10,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:38:10,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:38:10,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:38:10,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:38:10,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:38:10,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:38:10,072 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:38:10,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:38:10,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:38:10,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:38:10,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:38:10,073 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484c71f67ef44adda28419ba4f7367133d47a44b7b25589681c020e12726250b [2021-11-20 23:38:10,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:38:10,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:38:10,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:38:10,363 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:38:10,364 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:38:10,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-20 23:38:10,461 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/data/7eaac3896/5237b9674fc940f18e272a052d8aa103/FLAG1778587fb [2021-11-20 23:38:11,427 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:38:11,428 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-20 23:38:11,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/data/7eaac3896/5237b9674fc940f18e272a052d8aa103/FLAG1778587fb [2021-11-20 23:38:11,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/data/7eaac3896/5237b9674fc940f18e272a052d8aa103 [2021-11-20 23:38:11,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:38:11,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:38:11,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:38:11,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:38:11,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:38:11,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:38:11" (1/1) ... [2021-11-20 23:38:11,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4650aefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:11, skipping insertion in model container [2021-11-20 23:38:11,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:38:11" (1/1) ... [2021-11-20 23:38:11,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:38:12,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:38:16,243 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486836,486849] [2021-11-20 23:38:16,247 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486983,486996] [2021-11-20 23:38:16,247 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487122,487135] [2021-11-20 23:38:16,248 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487280,487293] [2021-11-20 23:38:16,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:38:16,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:38:16,955 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486836,486849] [2021-11-20 23:38:16,956 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[486983,486996] [2021-11-20 23:38:16,956 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487122,487135] [2021-11-20 23:38:16,957 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_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[487280,487293] [2021-11-20 23:38:16,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:38:17,325 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:38:17,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17 WrapperNode [2021-11-20 23:38:17,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:38:17,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:38:17,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:38:17,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:38:17,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:17,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:17,893 INFO L137 Inliner]: procedures = 480, calls = 6076, calls flagged for inlining = 277, calls inlined = 258, statements flattened = 11928 [2021-11-20 23:38:17,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:38:17,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:38:17,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:38:17,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:38:17,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:17,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:17,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:17,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:18,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:18,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:18,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:18,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:38:18,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:38:18,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:38:18,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:38:18,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (1/1) ... [2021-11-20 23:38:18,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:38:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:18,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:38:18,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b893d8e8-2024-4ebe-9da8-8d2c42b943fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:38:18,612 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-20 23:38:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-20 23:38:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:38:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:38:18,613 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:38:18,613 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:38:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_vfta [2021-11-20 23:38:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_vfta [2021-11-20 23:38:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:38:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:38:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_standby_eeprom [2021-11-20 23:38:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_standby_eeprom [2021-11-20 23:38:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-20 23:38:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-20 23:38:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 23:38:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 23:38:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-20 23:38:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-20 23:38:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:38:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:38:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_alloc_rx_buffers [2021-11-20 23:38:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_alloc_rx_buffers [2021-11-20 23:38:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure mac_addr_valid [2021-11-20 23:38:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure mac_addr_valid [2021-11-20 23:38:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_vlan_rx_add_vid [2021-11-20 23:38:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_vlan_rx_add_vid [2021-11-20 23:38:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_tx_resources [2021-11-20 23:38:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_tx_resources [2021-11-20 23:38:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-20 23:38:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-20 23:38:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_multi [2021-11-20 23:38:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_multi [2021-11-20 23:38:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_rar_set [2021-11-20 23:38:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_rar_set [2021-11-20 23:38:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-20 23:38:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-20 23:38:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:38:18,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:38:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 23:38:18,619 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 23:38:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:38:18,620 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:38:18,620 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_io_resume [2021-11-20 23:38:18,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_io_resume [2021-11-20 23:38:18,621 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:38:18,622 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:38:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:38:18,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:38:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:38:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-20 23:38:18,622 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-20 23:38:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_eeprom_checksum [2021-11-20 23:38:18,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_eeprom_checksum [2021-11-20 23:38:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-20 23:38:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-20 23:38:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_netpoll [2021-11-20 23:38:18,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_netpoll [2021-11-20 23:38:18,624 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:38:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:38:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:38:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_raise_clock [2021-11-20 23:38:18,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_raise_clock [2021-11-20 23:38:18,625 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_eeprom [2021-11-20 23:38:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_eeprom [2021-11-20 23:38:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 23:38:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 23:38:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_identify_xpak_vendor [2021-11-20 23:38:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_identify_xpak_vendor [2021-11-20 23:38:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:38:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:38:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:38:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_mac_reset [2021-11-20 23:38:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_mac_reset [2021-11-20 23:38:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_eeprom [2021-11-20 23:38:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_eeprom [2021-11-20 23:38:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:38:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_rx_resources [2021-11-20 23:38:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_rx_resources [2021-11-20 23:38:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 23:38:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 23:38:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure vzalloc [2021-11-20 23:38:18,630 INFO L138 BoogieDeclarations]: Found implementation of procedure vzalloc [2021-11-20 23:38:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:38:18,631 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:38:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-20 23:38:18,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-20 23:38:18,631 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-20 23:38:18,632 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-20 23:38:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:38:18,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:38:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-20 23:38:18,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-20 23:38:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_regs_len [2021-11-20 23:38:18,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_regs_len [2021-11-20 23:38:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-20 23:38:18,633 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-20 23:38:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-20 23:38:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-20 23:38:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_phy_reg [2021-11-20 23:38:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_phy_reg [2021-11-20 23:38:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_for_link [2021-11-20 23:38:18,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_for_link [2021-11-20 23:38:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_option [2021-11-20 23:38:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_option [2021-11-20 23:38:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:38:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 23:38:18,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 23:38:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 23:38:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 23:38:18,640 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-20 23:38:18,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-20 23:38:18,641 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-20 23:38:18,642 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-20 23:38:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:38:18,642 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-20 23:38:18,647 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-20 23:38:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:38:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:38:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 23:38:18,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 23:38:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:38:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:38:18,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:38:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_lower_clock [2021-11-20 23:38:18,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_lower_clock [2021-11-20 23:38:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_reset [2021-11-20 23:38:18,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_reset [2021-11-20 23:38:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:38:18,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:38:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_remove [2021-11-20 23:38:18,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_remove [2021-11-20 23:38:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-20 23:38:18,650 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-20 23:38:18,650 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_len [2021-11-20 23:38:18,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_len [2021-11-20 23:38:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_up [2021-11-20 23:38:18,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_up [2021-11-20 23:38:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_irq_enable [2021-11-20 23:38:18,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_irq_enable [2021-11-20 23:38:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-20 23:38:18,651 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-20 23:38:18,651 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:38:18,652 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:38:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:38:18,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:38:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_tx_resources [2021-11-20 23:38:18,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_tx_resources [2021-11-20 23:38:18,652 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_maybe_stop_tx [2021-11-20 23:38:18,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_maybe_stop_tx [2021-11-20 23:38:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_intr [2021-11-20 23:38:18,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_intr [2021-11-20 23:38:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-20 23:38:18,653 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-20 23:38:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:38:18,653 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:38:18,653 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_open [2021-11-20 23:38:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_open [2021-11-20 23:38:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:38:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:38:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-20 23:38:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-20 23:38:18,654 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-20 23:38:18,654 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-20 23:38:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:38:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:38:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:38:18,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:38:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-20 23:38:18,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-20 23:38:18,655 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-20 23:38:18,656 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-20 23:38:18,656 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-20 23:38:18,656 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-20 23:38:18,656 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_update_stats [2021-11-20 23:38:18,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_update_stats [2021-11-20 23:38:18,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-20 23:38:18,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-20 23:38:18,657 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_and_get_eeprom_data [2021-11-20 23:38:18,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_and_get_eeprom_data [2021-11-20 23:38:18,658 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-20 23:38:18,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-20 23:38:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:38:18,659 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:38:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:38:18,659 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:38:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2021-11-20 23:38:18,659 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2021-11-20 23:38:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_close [2021-11-20 23:38:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_close [2021-11-20 23:38:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-20 23:38:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-20 23:38:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-20 23:38:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-20 23:38:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 23:38:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 23:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-20 23:38:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-20 23:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-20 23:38:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-20 23:38:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 23:38:18,661 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 23:38:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:38:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-20 23:38:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-20 23:38:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:38:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:38:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-20 23:38:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-20 23:38:18,663 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-20 23:38:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:38:18,663 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:38:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:38:18,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:38:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_link_reset [2021-11-20 23:38:18,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_link_reset [2021-11-20 23:38:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_speed_duplex [2021-11-20 23:38:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_speed_duplex [2021-11-20 23:38:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-20 23:38:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-20 23:38:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:38:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:38:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:38:18,665 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:38:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-20 23:38:18,665 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-20 23:38:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:38:18,665 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:38:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_unmap_and_free_tx_resource [2021-11-20 23:38:18,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_unmap_and_free_tx_resource [2021-11-20 23:38:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-20 23:38:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-20 23:38:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:38:18,670 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:38:18,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:38:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_eeprom [2021-11-20 23:38:18,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_eeprom [2021-11-20 23:38:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:38:18,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:38:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_phy_reg [2021-11-20 23:38:18,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_phy_reg [2021-11-20 23:38:18,671 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:38:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:38:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_ee_mac_addr [2021-11-20 23:38:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_ee_mac_addr [2021-11-20 23:38:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-20 23:38:18,673 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-20 23:38:18,673 INFO L130 BoogieDeclarations]: Found specification of procedure dma_set_mask_and_coherent [2021-11-20 23:38:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_set_mask_and_coherent [2021-11-20 23:38:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_tx_ring [2021-11-20 23:38:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_tx_ring [2021-11-20 23:38:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2021-11-20 23:38:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2021-11-20 23:38:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-20 23:38:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-20 23:38:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_rx_ring [2021-11-20 23:38:18,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_rx_ring [2021-11-20 23:38:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_shift_out_bits [2021-11-20 23:38:18,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_shift_out_bits [2021-11-20 23:38:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_down [2021-11-20 23:38:18,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_down [2021-11-20 23:38:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_tx_timeout [2021-11-20 23:38:18,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_tx_timeout [2021-11-20 23:38:18,676 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_rx_resources [2021-11-20 23:38:18,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_rx_resources [2021-11-20 23:38:18,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:38:18,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:38:18,676 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-20 23:38:18,676 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-20 23:38:18,676 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-20 23:38:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-20 23:38:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-20 23:38:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-20 23:38:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-20 23:38:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-20 23:38:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-20 23:38:18,677 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-20 23:38:18,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:38:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:38:18,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:38:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-20 23:38:18,678 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_data [2021-11-20 23:38:18,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_data [2021-11-20 23:38:19,972 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:38:19,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:38:20,344 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:38:48,829 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:38:49,186 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:38:51,477 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:38:51,477 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:38:51,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:38:51 BoogieIcfgContainer [2021-11-20 23:38:51,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:38:51,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:38:51,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:38:51,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:38:51,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:38:11" (1/3) ... [2021-11-20 23:38:51,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f212759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:38:51, skipping insertion in model container [2021-11-20 23:38:51,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:38:17" (2/3) ... [2021-11-20 23:38:51,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f212759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:38:51, skipping insertion in model container [2021-11-20 23:38:51,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:38:51" (3/3) ... [2021-11-20 23:38:51,493 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-20 23:38:51,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:38:51,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 23:38:51,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:38:51,591 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 23:38:51,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 23:38:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 2521 states, 1466 states have (on average 1.2462482946793998) internal successors, (1827), 1501 states have internal predecessors, (1827), 921 states have call successors, (921), 133 states have call predecessors, (921), 132 states have return successors, (916), 906 states have call predecessors, (916), 916 states have call successors, (916) [2021-11-20 23:38:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-20 23:38:51,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:51,705 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:51,705 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 681057594, now seen corresponding path program 1 times [2021-11-20 23:38:51,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:51,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348186849] [2021-11-20 23:38:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:51,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-20 23:38:52,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348186849] [2021-11-20 23:38:52,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348186849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:52,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:52,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:52,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916203520] [2021-11-20 23:38:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:52,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:38:52,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:38:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:52,682 INFO L87 Difference]: Start difference. First operand has 2521 states, 1466 states have (on average 1.2462482946793998) internal successors, (1827), 1501 states have internal predecessors, (1827), 921 states have call successors, (921), 133 states have call predecessors, (921), 132 states have return successors, (916), 906 states have call predecessors, (916), 916 states have call successors, (916) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:38:54,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:38:58,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:06,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:08,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:08,419 INFO L93 Difference]: Finished difference Result 7452 states and 10939 transitions. [2021-11-20 23:39:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:39:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 176 [2021-11-20 23:39:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:08,508 INFO L225 Difference]: With dead ends: 7452 [2021-11-20 23:39:08,508 INFO L226 Difference]: Without dead ends: 4946 [2021-11-20 23:39:08,543 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 23:39:08,547 INFO L933 BasicCegarLoop]: 4084 mSDtfsCounter, 3573 mSDsluCounter, 3620 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 7245 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:08,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3573 Valid, 7245 Invalid, 942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 937 Invalid, 2 Unknown, 0 Unchecked, 15.2s Time] [2021-11-20 23:39:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2021-11-20 23:39:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4943. [2021-11-20 23:39:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 2880 states have (on average 1.2409722222222221) internal successors, (3574), 2949 states have internal predecessors, (3574), 1799 states have call successors, (1799), 263 states have call predecessors, (1799), 262 states have return successors, (1797), 1776 states have call predecessors, (1797), 1797 states have call successors, (1797) [2021-11-20 23:39:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 7170 transitions. [2021-11-20 23:39:09,215 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 7170 transitions. Word has length 176 [2021-11-20 23:39:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:09,220 INFO L470 AbstractCegarLoop]: Abstraction has 4943 states and 7170 transitions. [2021-11-20 23:39:09,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-20 23:39:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 7170 transitions. [2021-11-20 23:39:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 23:39:09,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:09,241 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:09,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:39:09,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1997735714, now seen corresponding path program 1 times [2021-11-20 23:39:09,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:09,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191995757] [2021-11-20 23:39:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:09,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2021-11-20 23:39:09,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:09,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191995757] [2021-11-20 23:39:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191995757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:09,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:09,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:09,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505490467] [2021-11-20 23:39:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:39:09,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:39:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:39:09,794 INFO L87 Difference]: Start difference. First operand 4943 states and 7170 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:39:12,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:16,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:25,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:26,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:26,722 INFO L93 Difference]: Finished difference Result 11542 states and 16729 transitions. [2021-11-20 23:39:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:39:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 197 [2021-11-20 23:39:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:26,792 INFO L225 Difference]: With dead ends: 11542 [2021-11-20 23:39:26,792 INFO L226 Difference]: Without dead ends: 6632 [2021-11-20 23:39:26,830 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 23:39:26,831 INFO L933 BasicCegarLoop]: 3997 mSDtfsCounter, 2971 mSDsluCounter, 3573 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2971 SdHoareTripleChecker+Valid, 7123 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:26,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2971 Valid, 7123 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 992 Invalid, 2 Unknown, 0 Unchecked, 16.3s Time] [2021-11-20 23:39:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-11-20 23:39:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 6624. [2021-11-20 23:39:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 3846 states have (on average 1.2275091003640146) internal successors, (4721), 3930 states have internal predecessors, (4721), 2425 states have call successors, (2425), 352 states have call predecessors, (2425), 351 states have return successors, (2423), 2398 states have call predecessors, (2423), 2423 states have call successors, (2423) [2021-11-20 23:39:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 9569 transitions. [2021-11-20 23:39:27,518 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 9569 transitions. Word has length 197 [2021-11-20 23:39:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 6624 states and 9569 transitions. [2021-11-20 23:39:27,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 23:39:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 9569 transitions. [2021-11-20 23:39:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-20 23:39:27,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:27,529 INFO L514 BasicCegarLoop]: trace histogram [20, 16, 16, 16, 16, 16, 16, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:27,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:39:27,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash 248975431, now seen corresponding path program 1 times [2021-11-20 23:39:27,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:27,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299166837] [2021-11-20 23:39:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:27,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2021-11-20 23:39:28,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:28,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299166837] [2021-11-20 23:39:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299166837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:28,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:28,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:39:28,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120976501] [2021-11-20 23:39:28,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:39:28,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:39:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:39:28,168 INFO L87 Difference]: Start difference. First operand 6624 states and 9569 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:39:31,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:37,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:39,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:41,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:47,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:39:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:48,346 INFO L93 Difference]: Finished difference Result 13007 states and 18796 transitions. [2021-11-20 23:39:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:39:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 214 [2021-11-20 23:39:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:48,456 INFO L225 Difference]: With dead ends: 13007 [2021-11-20 23:39:48,456 INFO L226 Difference]: Without dead ends: 12990 [2021-11-20 23:39:48,466 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 23:39:48,467 INFO L933 BasicCegarLoop]: 4507 mSDtfsCounter, 3528 mSDsluCounter, 8598 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 12132 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3528 Valid, 12132 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1493 Invalid, 2 Unknown, 0 Unchecked, 19.7s Time] [2021-11-20 23:39:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12990 states. [2021-11-20 23:39:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12990 to 12984. [2021-11-20 23:39:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12984 states, 7545 states have (on average 1.2277004638833664) internal successors, (9263), 7702 states have internal predecessors, (9263), 4751 states have call successors, (4751), 687 states have call predecessors, (4751), 686 states have return successors, (4749), 4697 states have call predecessors, (4749), 4749 states have call successors, (4749) [2021-11-20 23:39:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12984 states to 12984 states and 18763 transitions. [2021-11-20 23:39:49,776 INFO L78 Accepts]: Start accepts. Automaton has 12984 states and 18763 transitions. Word has length 214 [2021-11-20 23:39:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:49,778 INFO L470 AbstractCegarLoop]: Abstraction has 12984 states and 18763 transitions. [2021-11-20 23:39:49,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:39:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12984 states and 18763 transitions. [2021-11-20 23:39:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-20 23:39:49,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:49,795 INFO L514 BasicCegarLoop]: trace histogram [20, 16, 16, 16, 16, 16, 16, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:49,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:39:49,795 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash 283763568, now seen corresponding path program 1 times [2021-11-20 23:39:49,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:49,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648119181] [2021-11-20 23:39:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:49,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:39:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-11-20 23:39:50,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:50,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648119181] [2021-11-20 23:39:50,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648119181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:39:50,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:39:50,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:39:50,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278988618] [2021-11-20 23:39:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:39:50,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:39:50,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:39:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:39:50,267 INFO L87 Difference]: Start difference. First operand 12984 states and 18763 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:39:53,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:00,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:05,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:06,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:07,044 INFO L93 Difference]: Finished difference Result 25915 states and 37468 transitions. [2021-11-20 23:40:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 240 [2021-11-20 23:40:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:07,150 INFO L225 Difference]: With dead ends: 25915 [2021-11-20 23:40:07,151 INFO L226 Difference]: Without dead ends: 16949 [2021-11-20 23:40:07,206 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 23:40:07,207 INFO L933 BasicCegarLoop]: 5636 mSDtfsCounter, 2845 mSDsluCounter, 3565 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2845 SdHoareTripleChecker+Valid, 8755 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:07,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2845 Valid, 8755 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1345 Invalid, 2 Unknown, 0 Unchecked, 16.3s Time] [2021-11-20 23:40:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16949 states. [2021-11-20 23:40:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16949 to 16939. [2021-11-20 23:40:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16939 states, 9838 states have (on average 1.226062207765806) internal successors, (12062), 10039 states have internal predecessors, (12062), 6207 states have call successors, (6207), 893 states have call predecessors, (6207), 892 states have return successors, (6205), 6135 states have call predecessors, (6205), 6205 states have call successors, (6205) [2021-11-20 23:40:08,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16939 states to 16939 states and 24474 transitions. [2021-11-20 23:40:08,695 INFO L78 Accepts]: Start accepts. Automaton has 16939 states and 24474 transitions. Word has length 240 [2021-11-20 23:40:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:08,696 INFO L470 AbstractCegarLoop]: Abstraction has 16939 states and 24474 transitions. [2021-11-20 23:40:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 1 states have call predecessors, (28), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:40:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16939 states and 24474 transitions. [2021-11-20 23:40:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-20 23:40:08,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:08,729 INFO L514 BasicCegarLoop]: trace histogram [21, 16, 16, 16, 16, 16, 16, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:08,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:40:08,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1466841959, now seen corresponding path program 1 times [2021-11-20 23:40:08,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:08,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285302956] [2021-11-20 23:40:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:08,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2021-11-20 23:40:09,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285302956] [2021-11-20 23:40:09,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285302956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:09,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:09,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:40:09,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696725297] [2021-11-20 23:40:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:09,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:09,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:09,134 INFO L87 Difference]: Start difference. First operand 16939 states and 24474 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:40:17,651 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:22,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:24,156 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:24,702 INFO L93 Difference]: Finished difference Result 35392 states and 50861 transitions. [2021-11-20 23:40:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 267 [2021-11-20 23:40:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:24,825 INFO L225 Difference]: With dead ends: 35392 [2021-11-20 23:40:24,826 INFO L226 Difference]: Without dead ends: 18486 [2021-11-20 23:40:24,899 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 23:40:24,900 INFO L933 BasicCegarLoop]: 3874 mSDtfsCounter, 2577 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 6967 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:24,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2577 Valid, 6967 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 989 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2021-11-20 23:40:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18486 states. [2021-11-20 23:40:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18486 to 18473. [2021-11-20 23:40:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18473 states, 10728 states have (on average 1.2160700969425802) internal successors, (13046), 10965 states have internal predecessors, (13046), 6672 states have call successors, (6672), 1074 states have call predecessors, (6672), 1071 states have return successors, (6672), 6578 states have call predecessors, (6672), 6670 states have call successors, (6672) [2021-11-20 23:40:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18473 states to 18473 states and 26390 transitions. [2021-11-20 23:40:26,450 INFO L78 Accepts]: Start accepts. Automaton has 18473 states and 26390 transitions. Word has length 267 [2021-11-20 23:40:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:26,451 INFO L470 AbstractCegarLoop]: Abstraction has 18473 states and 26390 transitions. [2021-11-20 23:40:26,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:40:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 18473 states and 26390 transitions. [2021-11-20 23:40:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-20 23:40:26,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:26,462 INFO L514 BasicCegarLoop]: trace histogram [22, 16, 16, 16, 16, 16, 16, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:26,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:40:26,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2035794060, now seen corresponding path program 1 times [2021-11-20 23:40:26,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:26,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954033313] [2021-11-20 23:40:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:26,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1325 trivial. 0 not checked. [2021-11-20 23:40:27,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:27,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954033313] [2021-11-20 23:40:27,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954033313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:27,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:27,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:40:27,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994083720] [2021-11-20 23:40:27,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:27,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:40:27,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:27,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:40:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:40:27,047 INFO L87 Difference]: Start difference. First operand 18473 states and 26390 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 23:40:35,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:44,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:46,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:50,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:53,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:57,326 INFO L93 Difference]: Finished difference Result 35502 states and 51839 transitions. [2021-11-20 23:40:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:40:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 302 [2021-11-20 23:40:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:57,721 INFO L225 Difference]: With dead ends: 35502 [2021-11-20 23:40:57,721 INFO L226 Difference]: Without dead ends: 35500 [2021-11-20 23:40:57,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:40:57,739 INFO L933 BasicCegarLoop]: 4932 mSDtfsCounter, 5528 mSDsluCounter, 9644 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 457 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5853 SdHoareTripleChecker+Valid, 13487 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:57,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5853 Valid, 13487 Invalid, 2453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [457 Valid, 1992 Invalid, 4 Unknown, 0 Unchecked, 29.3s Time] [2021-11-20 23:40:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35500 states. [2021-11-20 23:41:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35500 to 27589. [2021-11-20 23:41:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27589 states, 16014 states have (on average 1.2167478456350693) internal successors, (19485), 16376 states have internal predecessors, (19485), 9974 states have call successors, (9974), 1603 states have call predecessors, (9974), 1599 states have return successors, (9975), 9828 states have call predecessors, (9975), 9972 states have call successors, (9975) [2021-11-20 23:41:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27589 states to 27589 states and 39434 transitions. [2021-11-20 23:41:00,880 INFO L78 Accepts]: Start accepts. Automaton has 27589 states and 39434 transitions. Word has length 302 [2021-11-20 23:41:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:00,881 INFO L470 AbstractCegarLoop]: Abstraction has 27589 states and 39434 transitions. [2021-11-20 23:41:00,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 23:41:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27589 states and 39434 transitions. [2021-11-20 23:41:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-11-20 23:41:00,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:00,928 INFO L514 BasicCegarLoop]: trace histogram [31, 19, 19, 19, 19, 19, 19, 18, 18, 8, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:41:00,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:00,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1602766164, now seen corresponding path program 1 times [2021-11-20 23:41:00,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:00,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032219703] [2021-11-20 23:41:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:00,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2021-11-20 23:41:01,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032219703] [2021-11-20 23:41:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032219703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:01,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:01,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:41:01,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309156339] [2021-11-20 23:41:01,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:01,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:01,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:01,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:01,524 INFO L87 Difference]: Start difference. First operand 27589 states and 39434 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2021-11-20 23:41:05,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:08,766 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:11,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:14,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:16,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:17,321 INFO L93 Difference]: Finished difference Result 54839 states and 78411 transitions. [2021-11-20 23:41:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 661 [2021-11-20 23:41:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:17,486 INFO L225 Difference]: With dead ends: 54839 [2021-11-20 23:41:17,486 INFO L226 Difference]: Without dead ends: 27631 [2021-11-20 23:41:17,602 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 23:41:17,603 INFO L933 BasicCegarLoop]: 3166 mSDtfsCounter, 6 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6329 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:17,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 6329 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 929 Invalid, 3 Unknown, 0 Unchecked, 14.7s Time] [2021-11-20 23:41:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27631 states. [2021-11-20 23:41:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27631 to 27595. [2021-11-20 23:41:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27595 states, 16020 states have (on average 1.2166666666666666) internal successors, (19491), 16382 states have internal predecessors, (19491), 9974 states have call successors, (9974), 1603 states have call predecessors, (9974), 1599 states have return successors, (9975), 9828 states have call predecessors, (9975), 9972 states have call successors, (9975) [2021-11-20 23:41:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27595 states to 27595 states and 39440 transitions. [2021-11-20 23:41:19,822 INFO L78 Accepts]: Start accepts. Automaton has 27595 states and 39440 transitions. Word has length 661 [2021-11-20 23:41:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:19,824 INFO L470 AbstractCegarLoop]: Abstraction has 27595 states and 39440 transitions. [2021-11-20 23:41:19,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2021-11-20 23:41:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 27595 states and 39440 transitions. [2021-11-20 23:41:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2021-11-20 23:41:19,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:19,869 INFO L514 BasicCegarLoop]: trace histogram [31, 19, 19, 19, 19, 19, 19, 18, 18, 8, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:19,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:41:19,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1364879831, now seen corresponding path program 1 times [2021-11-20 23:41:19,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334660882] [2021-11-20 23:41:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:19,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2021-11-20 23:41:21,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:21,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334660882] [2021-11-20 23:41:21,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334660882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:21,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:21,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:41:21,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926735578] [2021-11-20 23:41:21,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:21,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:21,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:21,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:21,003 INFO L87 Difference]: Start difference. First operand 27595 states and 39440 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-20 23:41:24,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:28,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:32,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:38,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:38,896 INFO L93 Difference]: Finished difference Result 62906 states and 89819 transitions. [2021-11-20 23:41:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 663 [2021-11-20 23:41:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:39,059 INFO L225 Difference]: With dead ends: 62906 [2021-11-20 23:41:39,059 INFO L226 Difference]: Without dead ends: 35692 [2021-11-20 23:41:39,179 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 23:41:39,180 INFO L933 BasicCegarLoop]: 5404 mSDtfsCounter, 2606 mSDsluCounter, 3529 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2606 SdHoareTripleChecker+Valid, 8515 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:39,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2606 Valid, 8515 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1313 Invalid, 2 Unknown, 0 Unchecked, 16.7s Time] [2021-11-20 23:41:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35692 states. [2021-11-20 23:41:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35692 to 35677. [2021-11-20 23:41:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35677 states, 20814 states have (on average 1.2214374939944268) internal successors, (25423), 21290 states have internal predecessors, (25423), 12713 states have call successors, (12713), 2155 states have call predecessors, (12713), 2148 states have return successors, (12717), 12513 states have call predecessors, (12717), 12711 states have call successors, (12717) [2021-11-20 23:41:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35677 states to 35677 states and 50853 transitions. [2021-11-20 23:41:41,787 INFO L78 Accepts]: Start accepts. Automaton has 35677 states and 50853 transitions. Word has length 663 [2021-11-20 23:41:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:41,788 INFO L470 AbstractCegarLoop]: Abstraction has 35677 states and 50853 transitions. [2021-11-20 23:41:41,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 3 states have call successors, (94), 2 states have call predecessors, (94), 1 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2021-11-20 23:41:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35677 states and 50853 transitions. [2021-11-20 23:41:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-11-20 23:41:41,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:41,849 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:41:41,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1730661765, now seen corresponding path program 1 times [2021-11-20 23:41:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:41,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878231443] [2021-11-20 23:41:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:41,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:41:42,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878231443] [2021-11-20 23:41:42,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878231443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:42,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:42,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:41:42,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789989539] [2021-11-20 23:41:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:42,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:41:42,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:41:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:41:42,874 INFO L87 Difference]: Start difference. First operand 35677 states and 50853 transitions. Second operand has 5 states, 5 states have (on average 52.2) internal successors, (261), 4 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:41:54,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:59,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:01,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:03,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:04,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:10,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:17,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:20,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:20,819 INFO L93 Difference]: Finished difference Result 78764 states and 112033 transitions. [2021-11-20 23:42:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:42:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.2) internal successors, (261), 4 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 685 [2021-11-20 23:42:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:20,986 INFO L225 Difference]: With dead ends: 78764 [2021-11-20 23:42:20,987 INFO L226 Difference]: Without dead ends: 43468 [2021-11-20 23:42:21,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:42:21,098 INFO L933 BasicCegarLoop]: 5403 mSDtfsCounter, 2556 mSDsluCounter, 15886 mSDsCounter, 0 mSdLazyCounter, 2897 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 19322 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2897 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:21,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2556 Valid, 19322 Invalid, 2902 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2897 Invalid, 4 Unknown, 0 Unchecked, 36.4s Time] [2021-11-20 23:42:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43468 states. [2021-11-20 23:42:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43468 to 43435. [2021-11-20 23:42:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43435 states, 25293 states have (on average 1.2161862966038035) internal successors, (30761), 25883 states have internal predecessors, (30761), 15443 states have call successors, (15443), 2698 states have call predecessors, (15443), 2697 states have return successors, (15459), 15198 states have call predecessors, (15459), 15441 states have call successors, (15459) [2021-11-20 23:42:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43435 states to 43435 states and 61663 transitions. [2021-11-20 23:42:24,266 INFO L78 Accepts]: Start accepts. Automaton has 43435 states and 61663 transitions. Word has length 685 [2021-11-20 23:42:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:24,268 INFO L470 AbstractCegarLoop]: Abstraction has 43435 states and 61663 transitions. [2021-11-20 23:42:24,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.2) internal successors, (261), 4 states have internal predecessors, (261), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:42:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 43435 states and 61663 transitions. [2021-11-20 23:42:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-11-20 23:42:24,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:24,309 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:24,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:42:24,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:42:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1890531482, now seen corresponding path program 1 times [2021-11-20 23:42:24,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:24,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706185731] [2021-11-20 23:42:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:24,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:42:25,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:25,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706185731] [2021-11-20 23:42:25,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706185731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:42:25,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:42:25,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:42:25,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985593858] [2021-11-20 23:42:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:42:25,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:42:25,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:42:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:42:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:42:25,239 INFO L87 Difference]: Start difference. First operand 43435 states and 61663 transitions. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:42:30,380 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:36,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:38,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:42,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:44,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:46,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:52,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:57,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:58,290 INFO L93 Difference]: Finished difference Result 94031 states and 133260 transitions. [2021-11-20 23:42:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:42:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 686 [2021-11-20 23:42:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:58,500 INFO L225 Difference]: With dead ends: 94031 [2021-11-20 23:42:58,500 INFO L226 Difference]: Without dead ends: 50977 [2021-11-20 23:42:58,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:42:58,769 INFO L933 BasicCegarLoop]: 5285 mSDtfsCounter, 2430 mSDsluCounter, 15574 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2430 SdHoareTripleChecker+Valid, 18948 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2430 Valid, 18948 Invalid, 2828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 2821 Invalid, 4 Unknown, 0 Unchecked, 31.5s Time] [2021-11-20 23:42:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50977 states. [2021-11-20 23:43:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50977 to 50944. [2021-11-20 23:43:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50944 states, 29598 states have (on average 1.2112304885465235) internal successors, (35850), 30299 states have internal predecessors, (35850), 18092 states have call successors, (18092), 3247 states have call predecessors, (18092), 3252 states have return successors, (18120), 17805 states have call predecessors, (18120), 18090 states have call successors, (18120) [2021-11-20 23:43:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50944 states to 50944 states and 72062 transitions. [2021-11-20 23:43:01,932 INFO L78 Accepts]: Start accepts. Automaton has 50944 states and 72062 transitions. Word has length 686 [2021-11-20 23:43:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:01,933 INFO L470 AbstractCegarLoop]: Abstraction has 50944 states and 72062 transitions. [2021-11-20 23:43:01,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.4) internal successors, (262), 4 states have internal predecessors, (262), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:43:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 50944 states and 72062 transitions. [2021-11-20 23:43:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2021-11-20 23:43:01,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:01,956 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:01,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:43:01,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1003229605, now seen corresponding path program 1 times [2021-11-20 23:43:01,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:01,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470437891] [2021-11-20 23:43:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:01,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:43:03,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:03,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470437891] [2021-11-20 23:43:03,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470437891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:03,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:43:03,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125338261] [2021-11-20 23:43:03,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:03,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:43:03,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:43:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:43:03,011 INFO L87 Difference]: Start difference. First operand 50944 states and 72062 transitions. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:43:07,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:09,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:15,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:18,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:22,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:28,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:35,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:39,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:40,713 INFO L93 Difference]: Finished difference Result 110162 states and 155621 transitions. [2021-11-20 23:43:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:43:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 687 [2021-11-20 23:43:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:41,078 INFO L225 Difference]: With dead ends: 110162 [2021-11-20 23:43:41,078 INFO L226 Difference]: Without dead ends: 59599 [2021-11-20 23:43:41,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:43:41,198 INFO L933 BasicCegarLoop]: 5406 mSDtfsCounter, 2594 mSDsluCounter, 15851 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2594 SdHoareTripleChecker+Valid, 19296 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:41,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2594 Valid, 19296 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2908 Invalid, 3 Unknown, 0 Unchecked, 35.8s Time] [2021-11-20 23:43:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59599 states. [2021-11-20 23:43:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59599 to 59566. [2021-11-20 23:43:44,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59566 states, 34554 states have (on average 1.2073566012617931) internal successors, (41719), 35369 states have internal predecessors, (41719), 21119 states have call successors, (21119), 3880 states have call predecessors, (21119), 3891 states have return successors, (21159), 20787 states have call predecessors, (21159), 21117 states have call successors, (21159) [2021-11-20 23:43:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59566 states to 59566 states and 83997 transitions. [2021-11-20 23:43:44,765 INFO L78 Accepts]: Start accepts. Automaton has 59566 states and 83997 transitions. Word has length 687 [2021-11-20 23:43:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:44,773 INFO L470 AbstractCegarLoop]: Abstraction has 59566 states and 83997 transitions. [2021-11-20 23:43:44,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 4 states have internal predecessors, (263), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:43:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 59566 states and 83997 transitions. [2021-11-20 23:43:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-11-20 23:43:44,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:44,816 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:44,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:43:44,817 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -977321781, now seen corresponding path program 1 times [2021-11-20 23:43:44,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:44,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282231754] [2021-11-20 23:43:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:44,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:43:45,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:45,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282231754] [2021-11-20 23:43:45,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282231754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:45,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:45,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:43:45,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310892111] [2021-11-20 23:43:45,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:43:45,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:43:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:43:45,731 INFO L87 Difference]: Start difference. First operand 59566 states and 83997 transitions. Second operand has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:43:52,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:59,250 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:00,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:04,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:06,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:08,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:13,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:20,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:23,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:44:24,170 INFO L93 Difference]: Finished difference Result 126608 states and 178435 transitions. [2021-11-20 23:44:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:44:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 688 [2021-11-20 23:44:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:44:24,626 INFO L225 Difference]: With dead ends: 126608 [2021-11-20 23:44:24,626 INFO L226 Difference]: Without dead ends: 67423 [2021-11-20 23:44:24,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:24,760 INFO L933 BasicCegarLoop]: 5407 mSDtfsCounter, 2558 mSDsluCounter, 15890 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19332 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:44:24,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2558 Valid, 19332 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2912 Invalid, 5 Unknown, 0 Unchecked, 36.5s Time] [2021-11-20 23:44:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67423 states. [2021-11-20 23:44:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67423 to 67390. [2021-11-20 23:44:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67390 states, 39093 states have (on average 1.205254137569386) internal successors, (47117), 40022 states have internal predecessors, (47117), 23849 states have call successors, (23849), 4429 states have call predecessors, (23849), 4446 states have return successors, (23901), 23472 states have call predecessors, (23901), 23847 states have call successors, (23901) [2021-11-20 23:44:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67390 states to 67390 states and 94867 transitions. [2021-11-20 23:44:28,713 INFO L78 Accepts]: Start accepts. Automaton has 67390 states and 94867 transitions. Word has length 688 [2021-11-20 23:44:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:44:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 67390 states and 94867 transitions. [2021-11-20 23:44:28,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.8) internal successors, (264), 4 states have internal predecessors, (264), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:44:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 67390 states and 94867 transitions. [2021-11-20 23:44:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2021-11-20 23:44:28,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:44:28,772 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:44:28,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:44:28,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:44:28,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:44:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1911783667, now seen corresponding path program 1 times [2021-11-20 23:44:28,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:44:28,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802229912] [2021-11-20 23:44:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:44:28,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:44:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:44:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:44:29,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:44:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802229912] [2021-11-20 23:44:29,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802229912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:44:29,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:44:29,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:44:29,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211329876] [2021-11-20 23:44:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:44:29,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:44:29,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:44:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:44:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:44:29,756 INFO L87 Difference]: Start difference. First operand 67390 states and 94867 transitions. Second operand has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:44:34,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:42,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:44,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:49,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:51,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:53,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:44:55,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:07,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:08,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:12,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:45:13,313 INFO L93 Difference]: Finished difference Result 142292 states and 200223 transitions. [2021-11-20 23:45:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:45:13,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 689 [2021-11-20 23:45:13,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:45:13,988 INFO L225 Difference]: With dead ends: 142292 [2021-11-20 23:45:13,988 INFO L226 Difference]: Without dead ends: 75283 [2021-11-20 23:45:14,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:14,177 INFO L933 BasicCegarLoop]: 5406 mSDtfsCounter, 2569 mSDsluCounter, 15879 mSDsCounter, 0 mSdLazyCounter, 2916 mSolverCounterSat, 8 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 19320 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2916 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:45:14,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2569 Valid, 19320 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2916 Invalid, 5 Unknown, 0 Unchecked, 41.3s Time] [2021-11-20 23:45:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75283 states. [2021-11-20 23:45:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75283 to 75250. [2021-11-20 23:45:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75250 states, 43653 states have (on average 1.203491168991822) internal successors, (52536), 44696 states have internal predecessors, (52536), 26588 states have call successors, (26588), 4984 states have call predecessors, (26588), 5007 states have return successors, (26652), 26166 states have call predecessors, (26652), 26586 states have call successors, (26652) [2021-11-20 23:45:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75250 states to 75250 states and 105776 transitions. [2021-11-20 23:45:18,709 INFO L78 Accepts]: Start accepts. Automaton has 75250 states and 105776 transitions. Word has length 689 [2021-11-20 23:45:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:45:18,710 INFO L470 AbstractCegarLoop]: Abstraction has 75250 states and 105776 transitions. [2021-11-20 23:45:18,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.0) internal successors, (265), 4 states have internal predecessors, (265), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:45:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 75250 states and 105776 transitions. [2021-11-20 23:45:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2021-11-20 23:45:18,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:45:18,782 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:18,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:45:18,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:45:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:45:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash -368475776, now seen corresponding path program 1 times [2021-11-20 23:45:18,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:45:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256436732] [2021-11-20 23:45:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:45:18,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:45:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:45:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:45:19,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:45:19,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256436732] [2021-11-20 23:45:19,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256436732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:45:19,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:45:19,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:45:19,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298851280] [2021-11-20 23:45:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:45:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:45:19,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:45:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:45:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:45:19,439 INFO L87 Difference]: Start difference. First operand 75250 states and 105776 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:45:29,829 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:33,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:35,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:40,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:42,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:44,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:51,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:45:56,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:00,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:03,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:04,035 INFO L93 Difference]: Finished difference Result 157487 states and 221288 transitions. [2021-11-20 23:46:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:46:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 690 [2021-11-20 23:46:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:04,629 INFO L225 Difference]: With dead ends: 157487 [2021-11-20 23:46:04,629 INFO L226 Difference]: Without dead ends: 82618 [2021-11-20 23:46:04,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:04,832 INFO L933 BasicCegarLoop]: 5170 mSDtfsCounter, 2305 mSDsluCounter, 15393 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 8 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 18623 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:04,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2309 Valid, 18623 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2882 Invalid, 5 Unknown, 0 Unchecked, 42.1s Time] [2021-11-20 23:46:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82618 states. [2021-11-20 23:46:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82618 to 82582. [2021-11-20 23:46:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82582 states, 47931 states have (on average 1.202687196177839) internal successors, (57646), 49091 states have internal predecessors, (57646), 29093 states have call successors, (29093), 5527 states have call predecessors, (29093), 5556 states have return successors, (29181), 28623 states have call predecessors, (29181), 29091 states have call successors, (29181) [2021-11-20 23:46:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82582 states to 82582 states and 115920 transitions. [2021-11-20 23:46:09,643 INFO L78 Accepts]: Start accepts. Automaton has 82582 states and 115920 transitions. Word has length 690 [2021-11-20 23:46:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:09,644 INFO L470 AbstractCegarLoop]: Abstraction has 82582 states and 115920 transitions. [2021-11-20 23:46:09,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:46:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82582 states and 115920 transitions. [2021-11-20 23:46:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2021-11-20 23:46:09,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:09,681 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:46:09,682 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -104725084, now seen corresponding path program 1 times [2021-11-20 23:46:09,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:09,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263722401] [2021-11-20 23:46:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:09,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:46:10,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263722401] [2021-11-20 23:46:10,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263722401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:10,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:10,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:46:10,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68188277] [2021-11-20 23:46:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:10,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:10,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:10,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:10,804 INFO L87 Difference]: Start difference. First operand 82582 states and 115920 transitions. Second operand has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:46:22,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:27,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:29,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:31,207 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:33,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:45,276 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:48,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:46:50,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:50,307 INFO L93 Difference]: Finished difference Result 172655 states and 242329 transitions. [2021-11-20 23:46:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:46:50,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 691 [2021-11-20 23:46:50,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:50,715 INFO L225 Difference]: With dead ends: 172655 [2021-11-20 23:46:50,715 INFO L226 Difference]: Without dead ends: 90454 [2021-11-20 23:46:50,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:50,908 INFO L933 BasicCegarLoop]: 5407 mSDtfsCounter, 2558 mSDsluCounter, 15890 mSDsCounter, 0 mSdLazyCounter, 2922 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19332 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2922 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:50,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2558 Valid, 19332 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2922 Invalid, 4 Unknown, 0 Unchecked, 36.7s Time] [2021-11-20 23:46:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90454 states. [2021-11-20 23:46:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90454 to 90421. [2021-11-20 23:46:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90421 states, 52491 states have (on average 1.2014440570764513) internal successors, (63065), 53765 states have internal predecessors, (63065), 31823 states have call successors, (31823), 6070 states have call predecessors, (31823), 6105 states have return successors, (31923), 31308 states have call predecessors, (31923), 31821 states have call successors, (31923) [2021-11-20 23:46:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90421 states to 90421 states and 126811 transitions. [2021-11-20 23:46:56,274 INFO L78 Accepts]: Start accepts. Automaton has 90421 states and 126811 transitions. Word has length 691 [2021-11-20 23:46:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:56,275 INFO L470 AbstractCegarLoop]: Abstraction has 90421 states and 126811 transitions. [2021-11-20 23:46:56,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.4) internal successors, (267), 4 states have internal predecessors, (267), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:46:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 90421 states and 126811 transitions. [2021-11-20 23:46:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-11-20 23:46:56,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:56,315 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:56,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:46:56,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1430988542, now seen corresponding path program 1 times [2021-11-20 23:46:56,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889418997] [2021-11-20 23:46:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:56,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:46:56,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:56,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889418997] [2021-11-20 23:46:56,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889418997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:56,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:56,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:46:56,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890043827] [2021-11-20 23:46:56,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:56,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:46:56,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:46:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:46:56,910 INFO L87 Difference]: Start difference. First operand 90421 states and 126811 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:47:03,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:10,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:15,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:29,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:47:30,518 INFO L93 Difference]: Finished difference Result 188342 states and 264129 transitions. [2021-11-20 23:47:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:47:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 692 [2021-11-20 23:47:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:47:31,156 INFO L225 Difference]: With dead ends: 188342 [2021-11-20 23:47:31,156 INFO L226 Difference]: Without dead ends: 98302 [2021-11-20 23:47:31,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:47:31,365 INFO L933 BasicCegarLoop]: 5407 mSDtfsCounter, 2558 mSDsluCounter, 15887 mSDsCounter, 0 mSdLazyCounter, 2923 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 19332 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2923 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:47:31,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2558 Valid, 19332 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2923 Invalid, 3 Unknown, 0 Unchecked, 31.2s Time] [2021-11-20 23:47:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98302 states. [2021-11-20 23:47:36,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98302 to 98269. [2021-11-20 23:47:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98269 states, 57060 states have (on average 1.2003680336487907) internal successors, (68493), 58448 states have internal predecessors, (68493), 34553 states have call successors, (34553), 6613 states have call predecessors, (34553), 6654 states have return successors, (34665), 33993 states have call predecessors, (34665), 34551 states have call successors, (34665) [2021-11-20 23:47:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98269 states to 98269 states and 137711 transitions. [2021-11-20 23:47:36,906 INFO L78 Accepts]: Start accepts. Automaton has 98269 states and 137711 transitions. Word has length 692 [2021-11-20 23:47:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:47:36,907 INFO L470 AbstractCegarLoop]: Abstraction has 98269 states and 137711 transitions. [2021-11-20 23:47:36,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:47:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 98269 states and 137711 transitions. [2021-11-20 23:47:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2021-11-20 23:47:36,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:47:36,945 INFO L514 BasicCegarLoop]: trace histogram [33, 19, 19, 19, 19, 19, 19, 18, 18, 8, 6, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:36,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:47:36,945 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:47:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:47:36,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1405719646, now seen corresponding path program 1 times [2021-11-20 23:47:36,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:47:36,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360110771] [2021-11-20 23:47:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:47:36,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:47:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:47:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2712 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-20 23:47:37,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:47:37,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360110771] [2021-11-20 23:47:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360110771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:47:37,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:47:37,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:47:37,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499817549] [2021-11-20 23:47:37,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:47:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:47:37,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:47:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:47:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:47:37,887 INFO L87 Difference]: Start difference. First operand 98269 states and 137711 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) [2021-11-20 23:47:42,372 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:49,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:51,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:56,669 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:47:58,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:01,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:11,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:13,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:15,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:18,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:48:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:48:20,362 INFO L93 Difference]: Finished difference Result 204047 states and 285947 transitions. [2021-11-20 23:48:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:48:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 3 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 4 states have call predecessors, (95), 3 states have call successors, (95) Word has length 693 [2021-11-20 23:48:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:48:20,756 INFO L225 Difference]: With dead ends: 204047 [2021-11-20 23:48:20,756 INFO L226 Difference]: Without dead ends: 106159 [2021-11-20 23:48:21,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:48:21,001 INFO L933 BasicCegarLoop]: 5407 mSDtfsCounter, 2698 mSDsluCounter, 15750 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 12 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2698 SdHoareTripleChecker+Valid, 19193 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:48:21,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2698 Valid, 19193 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2928 Invalid, 3 Unknown, 0 Unchecked, 39.2s Time] [2021-11-20 23:48:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106159 states.