./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7 --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 da295a433f96a090e97fd0ee72a58f7ad7a804da074c3950d4e4dc7d412af0ef --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:52:50,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:52:50,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:52:50,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:52:50,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:52:50,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:52:50,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:52:50,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:52:50,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:52:50,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:52:50,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:52:50,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:52:50,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:52:50,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:52:50,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:52:50,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:52:50,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:52:50,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:52:50,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:52:50,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:52:50,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:52:50,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:52:50,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:52:50,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:52:50,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:52:50,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:52:50,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:52:50,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:52:50,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:52:50,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:52:50,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:52:50,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:52:50,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:52:50,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:52:50,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:52:50,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:52:50,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:52:50,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:52:50,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:52:50,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:52:50,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:52:50,696 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:52:50,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:52:50,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:52:50,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:52:50,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:52:50,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:52:50,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:52:50,729 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:52:50,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:52:50,729 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:52:50,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:52:50,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:52:50,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:52:50,730 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:52:50,730 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:52:50,731 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:52:50,731 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:52:50,731 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:52:50,731 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:52:50,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:52:50,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:52:50,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:52:50,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:52:50,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:52:50,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:52:50,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:52:50,733 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:52:50,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:52:50,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:52:50,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:52:50,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:52:50,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:52:50,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:52:50,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:52:50,735 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:52:50,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:52:50,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:52:50,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:52:50,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:52:50,736 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_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da295a433f96a090e97fd0ee72a58f7ad7a804da074c3950d4e4dc7d412af0ef [2021-11-25 18:52:51,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:52:51,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:52:51,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:52:51,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:52:51,038 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:52:51,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i [2021-11-25 18:52:51,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/data/e5f68b6d4/d26ae7683b2f487fad892955b16055f6/FLAG2e28e3aab [2021-11-25 18:52:52,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:52:52,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i [2021-11-25 18:52:52,132 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/data/e5f68b6d4/d26ae7683b2f487fad892955b16055f6/FLAG2e28e3aab [2021-11-25 18:52:52,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/data/e5f68b6d4/d26ae7683b2f487fad892955b16055f6 [2021-11-25 18:52:52,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:52:52,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:52:52,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:52:52,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:52:52,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:52:52,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:52:52" (1/1) ... [2021-11-25 18:52:52,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f00c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:52, skipping insertion in model container [2021-11-25 18:52:52,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:52:52" (1/1) ... [2021-11-25 18:52:52,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:52:52,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:52:54,498 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277615,277628] [2021-11-25 18:52:54,502 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277762,277775] [2021-11-25 18:52:54,502 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277901,277914] [2021-11-25 18:52:54,503 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[278059,278072] [2021-11-25 18:52:54,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:52:54,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:52:55,016 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277615,277628] [2021-11-25 18:52:55,017 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277762,277775] [2021-11-25 18:52:55,017 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[277901,277914] [2021-11-25 18:52:55,018 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_5fe99ba1-a2a8-408b-929a-b4a318233777/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i[278059,278072] [2021-11-25 18:52:55,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:52:55,240 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:52:55,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55 WrapperNode [2021-11-25 18:52:55,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:52:55,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:52:55,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:52:55,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:52:55,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,644 INFO L137 Inliner]: procedures = 202, calls = 3694, calls flagged for inlining = 99, calls inlined = 91, statements flattened = 6973 [2021-11-25 18:52:55,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:52:55,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:52:55,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:52:55,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:52:55,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:52:55,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:52:55,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:52:55,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:52:55,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (1/1) ... [2021-11-25 18:52:55,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:52:55,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:55,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:52:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:52:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure sd_isoc_init [2021-11-25 18:52:55,997 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_isoc_init [2021-11-25 18:52:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure cit_check_button [2021-11-25 18:52:55,997 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_check_button [2021-11-25 18:52:55,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:52:55,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:52:55,998 INFO L130 BoogieDeclarations]: Found specification of procedure cit_send_x_01_00_05 [2021-11-25 18:52:55,998 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_send_x_01_00_05 [2021-11-25 18:52:55,998 INFO L130 BoogieDeclarations]: Found specification of procedure cit_send_x_00_05 [2021-11-25 18:52:55,998 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_send_x_00_05 [2021-11-25 18:52:55,998 INFO L130 BoogieDeclarations]: Found specification of procedure cit_PacketFormat2 [2021-11-25 18:52:55,998 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_PacketFormat2 [2021-11-25 18:52:55,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:52:55,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:52:55,999 INFO L130 BoogieDeclarations]: Found specification of procedure sd_start [2021-11-25 18:52:55,999 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_start [2021-11-25 18:52:55,999 INFO L130 BoogieDeclarations]: Found specification of procedure cit_send_x_00 [2021-11-25 18:52:55,999 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_send_x_00 [2021-11-25 18:52:56,000 INFO L130 BoogieDeclarations]: Found specification of procedure sd_isoc_nego [2021-11-25 18:52:56,000 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_isoc_nego [2021-11-25 18:52:56,000 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_frame_add [2021-11-25 18:52:56,000 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_frame_add [2021-11-25 18:52:56,000 INFO L130 BoogieDeclarations]: Found specification of procedure cit_model2_Packet1 [2021-11-25 18:52:56,000 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_model2_Packet1 [2021-11-25 18:52:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:52:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-25 18:52:56,001 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-25 18:52:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:52:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:52:56,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 18:52:56,001 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_new_std [2021-11-25 18:52:56,002 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_new_std [2021-11-25 18:52:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 18:52:56,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 18:52:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:52:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure cit_read_reg [2021-11-25 18:52:56,002 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_read_reg [2021-11-25 18:52:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:52:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 18:52:56,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 18:52:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure cit_get_packet_size [2021-11-25 18:52:56,003 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_get_packet_size [2021-11-25 18:52:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-25 18:52:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-25 18:52:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2021-11-25 18:52:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2021-11-25 18:52:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 18:52:56,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 18:52:56,004 INFO L130 BoogieDeclarations]: Found specification of procedure cit_model4_Packet1 [2021-11-25 18:52:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_model4_Packet1 [2021-11-25 18:52:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_grab [2021-11-25 18:52:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_grab [2021-11-25 18:52:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:52:56,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_2_4 [2021-11-25 18:52:56,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_2_4 [2021-11-25 18:52:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 18:52:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 18:52:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure sd_init [2021-11-25 18:52:56,006 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_init [2021-11-25 18:52:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:52:56,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_sd_driver_exit_6_2 [2021-11-25 18:52:56,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_sd_driver_exit_6_2 [2021-11-25 18:52:56,007 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2021-11-25 18:52:56,077 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2021-11-25 18:52:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_disconnect [2021-11-25 18:52:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_disconnect [2021-11-25 18:52:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure cit_restart_stream [2021-11-25 18:52:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_restart_stream [2021-11-25 18:52:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:52:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure gspca_resume [2021-11-25 18:52:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure gspca_resume [2021-11-25 18:52:56,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 18:52:56,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 18:52:56,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:52:56,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure cit_write_reg [2021-11-25 18:52:56,079 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_write_reg [2021-11-25 18:52:56,079 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-25 18:52:56,080 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-25 18:52:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure sd_stopN [2021-11-25 18:52:56,080 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_stopN [2021-11-25 18:52:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure sd_s_ctrl [2021-11-25 18:52:56,080 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_s_ctrl [2021-11-25 18:52:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure v4l2_ctrl_g_ctrl [2021-11-25 18:52:56,080 INFO L138 BoogieDeclarations]: Found implementation of procedure v4l2_ctrl_g_ctrl [2021-11-25 18:52:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 18:52:56,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 18:52:56,080 INFO L130 BoogieDeclarations]: Found specification of procedure sd_stop0 [2021-11-25 18:52:56,081 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_stop0 [2021-11-25 18:52:56,081 INFO L130 BoogieDeclarations]: Found specification of procedure cit_get_clock_div [2021-11-25 18:52:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_get_clock_div [2021-11-25 18:52:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure cit_model3_Packet1 [2021-11-25 18:52:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_model3_Packet1 [2021-11-25 18:52:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure cit_Packet_Format1 [2021-11-25 18:52:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_Packet_Format1 [2021-11-25 18:52:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure sd_init_controls [2021-11-25 18:52:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure sd_init_controls [2021-11-25 18:52:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:52:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure cit_send_FF_04_02 [2021-11-25 18:52:56,084 INFO L138 BoogieDeclarations]: Found implementation of procedure cit_send_FF_04_02 [2021-11-25 18:52:56,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 18:52:56,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 18:52:56,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:52:56,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:52:56,810 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:52:56,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:52:56,963 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:53:08,799 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 18:53:09,000 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:53:10,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:53:10,022 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:53:10,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:10 BoogieIcfgContainer [2021-11-25 18:53:10,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:53:10,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:53:10,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:53:10,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:53:10,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:52:52" (1/3) ... [2021-11-25 18:53:10,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c1ed7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:10, skipping insertion in model container [2021-11-25 18:53:10,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:52:55" (2/3) ... [2021-11-25 18:53:10,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c1ed7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:53:10, skipping insertion in model container [2021-11-25 18:53:10,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:53:10" (3/3) ... [2021-11-25 18:53:10,053 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-media-usb-gspca-gspca_xirlink_cit.cil.i [2021-11-25 18:53:10,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:53:10,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:53:10,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:53:10,163 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 [2021-11-25 18:53:10,165 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:53:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 2449 states, 1187 states have (on average 1.2080876158382476) internal successors, (1434), 1204 states have internal predecessors, (1434), 1213 states have call successors, (1213), 48 states have call predecessors, (1213), 47 states have return successors, (1207), 1200 states have call predecessors, (1207), 1207 states have call successors, (1207) [2021-11-25 18:53:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 18:53:10,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:10,327 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 18:53:10,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash -628031833, now seen corresponding path program 1 times [2021-11-25 18:53:10,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014407920] [2021-11-25 18:53:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:10,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-25 18:53:11,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014407920] [2021-11-25 18:53:11,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014407920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:11,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:11,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:11,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124849270] [2021-11-25 18:53:11,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:11,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:11,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:11,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:11,521 INFO L87 Difference]: Start difference. First operand has 2449 states, 1187 states have (on average 1.2080876158382476) internal successors, (1434), 1204 states have internal predecessors, (1434), 1213 states have call successors, (1213), 48 states have call predecessors, (1213), 47 states have return successors, (1207), 1200 states have call predecessors, (1207), 1207 states have call successors, (1207) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 18:53:13,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:16,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:18,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:20,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:21,318 INFO L93 Difference]: Finished difference Result 7187 states and 11337 transitions. [2021-11-25 18:53:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 104 [2021-11-25 18:53:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:21,420 INFO L225 Difference]: With dead ends: 7187 [2021-11-25 18:53:21,420 INFO L226 Difference]: Without dead ends: 4745 [2021-11-25 18:53:21,467 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 [2021-11-25 18:53:21,474 INFO L933 BasicCegarLoop]: 4873 mSDtfsCounter, 3701 mSDsluCounter, 3749 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3703 SdHoareTripleChecker+Valid, 8468 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:21,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3703 Valid, 8468 Invalid, 368 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 356 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2021-11-25 18:53:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2021-11-25 18:53:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4743. [2021-11-25 18:53:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 2290 states have (on average 1.1965065502183405) internal successors, (2740), 2321 states have internal predecessors, (2740), 2360 states have call successors, (2360), 92 states have call predecessors, (2360), 91 states have return successors, (2359), 2343 states have call predecessors, (2359), 2357 states have call successors, (2359) [2021-11-25 18:53:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 7459 transitions. [2021-11-25 18:53:23,383 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 7459 transitions. Word has length 104 [2021-11-25 18:53:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 7459 transitions. [2021-11-25 18:53:23,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 18:53:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 7459 transitions. [2021-11-25 18:53:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-25 18:53:23,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:23,397 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 18:53:23,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:53:23,398 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash 538718342, now seen corresponding path program 1 times [2021-11-25 18:53:23,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088492487] [2021-11-25 18:53:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:23,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-25 18:53:23,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:23,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088492487] [2021-11-25 18:53:23,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088492487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:23,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:23,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:23,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960766590] [2021-11-25 18:53:23,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:23,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:23,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:23,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:23,905 INFO L87 Difference]: Start difference. First operand 4743 states and 7459 transitions. 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 18:53:26,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:28,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:30,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:31,551 INFO L93 Difference]: Finished difference Result 11717 states and 18403 transitions. [2021-11-25 18:53:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:31,554 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 113 [2021-11-25 18:53:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:31,649 INFO L225 Difference]: With dead ends: 11717 [2021-11-25 18:53:31,649 INFO L226 Difference]: Without dead ends: 6991 [2021-11-25 18:53:31,717 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 [2021-11-25 18:53:31,719 INFO L933 BasicCegarLoop]: 4879 mSDtfsCounter, 3568 mSDsluCounter, 3738 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3570 SdHoareTripleChecker+Valid, 8470 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:31,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3570 Valid, 8470 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 363 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2021-11-25 18:53:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2021-11-25 18:53:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 6976. [2021-11-25 18:53:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6976 states, 3319 states have (on average 1.1792708647182886) internal successors, (3914), 3370 states have internal predecessors, (3914), 3515 states have call successors, (3515), 141 states have call predecessors, (3515), 140 states have return successors, (3516), 3485 states have call predecessors, (3516), 3512 states have call successors, (3516) [2021-11-25 18:53:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6976 states to 6976 states and 10945 transitions. [2021-11-25 18:53:33,977 INFO L78 Accepts]: Start accepts. Automaton has 6976 states and 10945 transitions. Word has length 113 [2021-11-25 18:53:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:33,978 INFO L470 AbstractCegarLoop]: Abstraction has 6976 states and 10945 transitions. [2021-11-25 18:53:33,979 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 18:53:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6976 states and 10945 transitions. [2021-11-25 18:53:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:53:33,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:33,994 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:53:33,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:53:33,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -796856215, now seen corresponding path program 1 times [2021-11-25 18:53:33,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250915904] [2021-11-25 18:53:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:34,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-25 18:53:34,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250915904] [2021-11-25 18:53:34,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250915904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:34,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:34,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:53:34,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267449886] [2021-11-25 18:53:34,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:34,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:53:34,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:53:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:53:34,511 INFO L87 Difference]: Start difference. First operand 6976 states and 10945 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:36,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:38,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:41,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:42,269 INFO L93 Difference]: Finished difference Result 16933 states and 26526 transitions. [2021-11-25 18:53:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:53:42,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 157 [2021-11-25 18:53:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:42,399 INFO L225 Difference]: With dead ends: 16933 [2021-11-25 18:53:42,399 INFO L226 Difference]: Without dead ends: 9974 [2021-11-25 18:53:42,470 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 [2021-11-25 18:53:42,474 INFO L933 BasicCegarLoop]: 6540 mSDtfsCounter, 3558 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 10131 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:42,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3559 Valid, 10131 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 393 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2021-11-25 18:53:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9974 states. [2021-11-25 18:53:45,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9974 to 9961. [2021-11-25 18:53:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9961 states, 4840 states have (on average 1.190495867768595) internal successors, (5762), 4931 states have internal predecessors, (5762), 4897 states have call successors, (4897), 223 states have call predecessors, (4897), 222 states have return successors, (4902), 4842 states have call predecessors, (4902), 4894 states have call successors, (4902) [2021-11-25 18:53:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 15561 transitions. [2021-11-25 18:53:45,478 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 15561 transitions. Word has length 157 [2021-11-25 18:53:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 9961 states and 15561 transitions. [2021-11-25 18:53:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:53:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 15561 transitions. [2021-11-25 18:53:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 18:53:45,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:45,487 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 5, 5, 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] [2021-11-25 18:53:45,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:53:45,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1320808926, now seen corresponding path program 1 times [2021-11-25 18:53:45,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677526261] [2021-11-25 18:53:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:45,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-25 18:53:45,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677526261] [2021-11-25 18:53:45,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677526261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:45,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:45,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:53:45,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129016791] [2021-11-25 18:53:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:45,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:53:45,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:53:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:53:45,936 INFO L87 Difference]: Start difference. First operand 9961 states and 15561 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:53:48,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:50,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:52,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:53:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:53:53,984 INFO L93 Difference]: Finished difference Result 17281 states and 27021 transitions. [2021-11-25 18:53:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:53:53,985 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 148 [2021-11-25 18:53:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:53:54,142 INFO L225 Difference]: With dead ends: 17281 [2021-11-25 18:53:54,143 INFO L226 Difference]: Without dead ends: 17238 [2021-11-25 18:53:54,158 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 [2021-11-25 18:53:54,164 INFO L933 BasicCegarLoop]: 4834 mSDtfsCounter, 3711 mSDsluCounter, 8751 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 13258 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:53:54,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 13258 Invalid, 502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2021-11-25 18:53:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2021-11-25 18:53:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 17236. [2021-11-25 18:53:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17236 states, 8366 states have (on average 1.190174515897681) internal successors, (9957), 8513 states have internal predecessors, (9957), 8488 states have call successors, (8488), 380 states have call predecessors, (8488), 380 states have return successors, (8501), 8403 states have call predecessors, (8501), 8485 states have call successors, (8501) [2021-11-25 18:53:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17236 states to 17236 states and 26946 transitions. [2021-11-25 18:53:58,243 INFO L78 Accepts]: Start accepts. Automaton has 17236 states and 26946 transitions. Word has length 148 [2021-11-25 18:53:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:53:58,245 INFO L470 AbstractCegarLoop]: Abstraction has 17236 states and 26946 transitions. [2021-11-25 18:53:58,245 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:53:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17236 states and 26946 transitions. [2021-11-25 18:53:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-25 18:53:58,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:53:58,258 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 18:53:58,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:53:58,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:53:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:53:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -572571958, now seen corresponding path program 1 times [2021-11-25 18:53:58,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:53:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78085218] [2021-11-25 18:53:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:53:58,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:53:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:53:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-25 18:53:58,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:53:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78085218] [2021-11-25 18:53:58,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78085218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:53:58,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:53:58,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:53:58,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559256464] [2021-11-25 18:53:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:53:58,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:53:58,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:53:58,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:53:58,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:53:58,627 INFO L87 Difference]: Start difference. First operand 17236 states and 26946 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 18:54:01,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:03,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:07,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:09,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:23,089 INFO L93 Difference]: Finished difference Result 56726 states and 88694 transitions. [2021-11-25 18:54:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:54:23,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 174 [2021-11-25 18:54:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:23,509 INFO L225 Difference]: With dead ends: 56726 [2021-11-25 18:54:23,510 INFO L226 Difference]: Without dead ends: 39507 [2021-11-25 18:54:23,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:23,727 INFO L933 BasicCegarLoop]: 9932 mSDtfsCounter, 7665 mSDsluCounter, 7479 mSDsCounter, 0 mSdLazyCounter, 7921 mSolverCounterSat, 1348 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7704 SdHoareTripleChecker+Valid, 16867 SdHoareTripleChecker+Invalid, 9272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1348 IncrementalHoareTripleChecker+Valid, 7921 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:23,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7704 Valid, 16867 Invalid, 9272 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1348 Valid, 7921 Invalid, 3 Unknown, 0 Unchecked, 22.4s Time] [2021-11-25 18:54:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39507 states. [2021-11-25 18:54:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39507 to 39447. [2021-11-25 18:54:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39447 states, 19167 states have (on average 1.192361871967444) internal successors, (22854), 19514 states have internal predecessors, (22854), 19403 states have call successors, (19403), 884 states have call predecessors, (19403), 875 states have return successors, (19431), 19188 states have call predecessors, (19431), 19400 states have call successors, (19431) [2021-11-25 18:54:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39447 states to 39447 states and 61688 transitions. [2021-11-25 18:54:34,924 INFO L78 Accepts]: Start accepts. Automaton has 39447 states and 61688 transitions. Word has length 174 [2021-11-25 18:54:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:34,925 INFO L470 AbstractCegarLoop]: Abstraction has 39447 states and 61688 transitions. [2021-11-25 18:54:34,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 18:54:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 39447 states and 61688 transitions. [2021-11-25 18:54:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-25 18:54:34,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:34,945 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:34,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:54:34,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1288977114, now seen corresponding path program 1 times [2021-11-25 18:54:34,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:34,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495817253] [2021-11-25 18:54:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:34,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-25 18:54:35,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:35,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495817253] [2021-11-25 18:54:35,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495817253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:35,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:35,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:54:35,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326959158] [2021-11-25 18:54:35,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:35,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:54:35,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:54:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:54:35,387 INFO L87 Difference]: Start difference. First operand 39447 states and 61688 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:54:37,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:39,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:42,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:54:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:45,548 INFO L93 Difference]: Finished difference Result 92267 states and 144222 transitions. [2021-11-25 18:54:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:54:45,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 174 [2021-11-25 18:54:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:46,216 INFO L225 Difference]: With dead ends: 92267 [2021-11-25 18:54:46,216 INFO L226 Difference]: Without dead ends: 53224 [2021-11-25 18:54:46,607 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 [2021-11-25 18:54:46,608 INFO L933 BasicCegarLoop]: 7062 mSDtfsCounter, 3593 mSDsluCounter, 3736 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 10651 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:46,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3595 Valid, 10651 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 480 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2021-11-25 18:54:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53224 states. [2021-11-25 18:54:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53224 to 53193. [2021-11-25 18:54:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53193 states, 26020 states have (on average 1.1964642582628746) internal successors, (31132), 26524 states have internal predecessors, (31132), 25932 states have call successors, (25932), 1252 states have call predecessors, (25932), 1239 states have return successors, (25976), 25615 states have call predecessors, (25976), 25929 states have call successors, (25976) [2021-11-25 18:54:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53193 states to 53193 states and 83040 transitions. [2021-11-25 18:54:57,761 INFO L78 Accepts]: Start accepts. Automaton has 53193 states and 83040 transitions. Word has length 174 [2021-11-25 18:54:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:57,762 INFO L470 AbstractCegarLoop]: Abstraction has 53193 states and 83040 transitions. [2021-11-25 18:54:57,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:54:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 53193 states and 83040 transitions. [2021-11-25 18:54:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 18:54:57,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:57,787 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 5, 3, 3, 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] [2021-11-25 18:54:57,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:54:57,787 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash -403602278, now seen corresponding path program 1 times [2021-11-25 18:54:57,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169675786] [2021-11-25 18:54:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:57,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-25 18:54:58,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169675786] [2021-11-25 18:54:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169675786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:58,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:58,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:54:58,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358480345] [2021-11-25 18:54:58,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:58,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:54:58,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:54:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:54:58,120 INFO L87 Difference]: Start difference. First operand 53193 states and 83040 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:55:00,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:02,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:05,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:06,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:08,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:12,929 INFO L93 Difference]: Finished difference Result 119616 states and 186640 transitions. [2021-11-25 18:55:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:55:12,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 195 [2021-11-25 18:55:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:13,421 INFO L225 Difference]: With dead ends: 119616 [2021-11-25 18:55:13,422 INFO L226 Difference]: Without dead ends: 66827 [2021-11-25 18:55:13,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:13,849 INFO L933 BasicCegarLoop]: 7061 mSDtfsCounter, 3565 mSDsluCounter, 18425 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 24774 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:13,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3567 Valid, 24774 Invalid, 1066 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 3 Unknown, 0 Unchecked, 11.4s Time] [2021-11-25 18:55:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66827 states. [2021-11-25 18:55:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66827 to 66774. [2021-11-25 18:55:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66774 states, 32719 states have (on average 1.1964302087472112) internal successors, (39146), 33380 states have internal predecessors, (39146), 32450 states have call successors, (32450), 1609 states have call predecessors, (32450), 1603 states have return successors, (32521), 32042 states have call predecessors, (32521), 32447 states have call successors, (32521) [2021-11-25 18:55:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66774 states to 66774 states and 104117 transitions. [2021-11-25 18:55:28,320 INFO L78 Accepts]: Start accepts. Automaton has 66774 states and 104117 transitions. Word has length 195 [2021-11-25 18:55:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:28,321 INFO L470 AbstractCegarLoop]: Abstraction has 66774 states and 104117 transitions. [2021-11-25 18:55:28,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:55:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 66774 states and 104117 transitions. [2021-11-25 18:55:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 18:55:28,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:28,351 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 5, 3, 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] [2021-11-25 18:55:28,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:55:28,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:28,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:28,352 INFO L85 PathProgramCache]: Analyzing trace with hash 855567864, now seen corresponding path program 1 times [2021-11-25 18:55:28,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:28,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445810822] [2021-11-25 18:55:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:28,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2021-11-25 18:55:28,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445810822] [2021-11-25 18:55:28,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445810822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:28,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:28,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:28,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057106420] [2021-11-25 18:55:28,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:28,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:28,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:28,724 INFO L87 Difference]: Start difference. First operand 66774 states and 104117 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 18:55:30,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:33,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:35,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:41,839 INFO L93 Difference]: Finished difference Result 197566 states and 308377 transitions. [2021-11-25 18:55:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:41,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 195 [2021-11-25 18:55:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:42,844 INFO L225 Difference]: With dead ends: 197566 [2021-11-25 18:55:42,844 INFO L226 Difference]: Without dead ends: 131196 [2021-11-25 18:55:43,575 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 [2021-11-25 18:55:43,576 INFO L933 BasicCegarLoop]: 6987 mSDtfsCounter, 3647 mSDsluCounter, 3752 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3649 SdHoareTripleChecker+Valid, 10583 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:43,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3649 Valid, 10583 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2021-11-25 18:55:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131196 states. [2021-11-25 18:56:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131196 to 131194. [2021-11-25 18:56:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131194 states, 64149 states have (on average 1.1934402718670596) internal successors, (76558), 65298 states have internal predecessors, (76558), 63999 states have call successors, (63999), 3039 states have call predecessors, (63999), 3044 states have return successors, (64145), 63368 states have call predecessors, (64145), 63996 states have call successors, (64145) [2021-11-25 18:56:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131194 states to 131194 states and 204702 transitions. [2021-11-25 18:56:17,361 INFO L78 Accepts]: Start accepts. Automaton has 131194 states and 204702 transitions. Word has length 195 [2021-11-25 18:56:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:17,363 INFO L470 AbstractCegarLoop]: Abstraction has 131194 states and 204702 transitions. [2021-11-25 18:56:17,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-25 18:56:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 131194 states and 204702 transitions. [2021-11-25 18:56:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-25 18:56:17,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:17,975 INFO L514 BasicCegarLoop]: trace histogram [17, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:17,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:56:17,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:56:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -174353474, now seen corresponding path program 1 times [2021-11-25 18:56:17,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:17,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516036484] [2021-11-25 18:56:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:17,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-11-25 18:56:18,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516036484] [2021-11-25 18:56:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516036484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:18,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765349739] [2021-11-25 18:56:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:18,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:18,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:18,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe99ba1-a2a8-408b-929a-b4a318233777/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:56:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 5340 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:56:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-25 18:56:20,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:56:20,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765349739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:56:20,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:56:20,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 18:56:20,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279982398] [2021-11-25 18:56:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:56:20,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:56:20,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:56:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:56:20,378 INFO L87 Difference]: Start difference. First operand 131194 states and 204702 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, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:56:22,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:56:24,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:56:27,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []