./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-net-ethernet-via-via-rhine.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3151b52776d19e2fb44a194d473cc3c38f1eb2b68210144e38eb8a78a9b4d4f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:45:00,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:45:00,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:45:00,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:45:00,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:45:00,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:45:00,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:45:00,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:45:00,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:45:00,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:45:00,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:45:00,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:45:00,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:45:00,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:45:00,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:45:00,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:45:00,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:45:00,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:45:00,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:45:00,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:45:00,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:45:00,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:45:00,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:45:00,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:45:00,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:45:00,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:45:00,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:45:00,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:45:00,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:45:00,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:45:00,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:45:00,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:45:00,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:45:00,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:45:00,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:45:00,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:45:00,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:45:00,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:45:00,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:45:00,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:45:00,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:45:00,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:45:00,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:45:00,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:45:00,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:45:00,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:45:00,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:45:01,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:45:01,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:45:01,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:45:01,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:45:01,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:45:01,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:45:01,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:45:01,002 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:45:01,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:45:01,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:45:01,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:45:01,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:45:01,003 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:45:01,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:45:01,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:45:01,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:45:01,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:45:01,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:45:01,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:45:01,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:45:01,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:45:01,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:45:01,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:45:01,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:45:01,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:01,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:45:01,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:45:01,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:45:01,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:45:01,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:45:01,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:45:01,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:45:01,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:45:01,008 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3151b52776d19e2fb44a194d473cc3c38f1eb2b68210144e38eb8a78a9b4d4f9 [2021-11-23 02:45:01,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:45:01,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:45:01,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:45:01,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:45:01,309 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:45:01,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i [2021-11-23 02:45:01,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/data/20b814eab/a677f205683b47eeb73c8fdf4ed518dd/FLAGcb42e8bb0 [2021-11-23 02:45:02,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:45:02,285 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i [2021-11-23 02:45:02,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/data/20b814eab/a677f205683b47eeb73c8fdf4ed518dd/FLAGcb42e8bb0 [2021-11-23 02:45:02,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/data/20b814eab/a677f205683b47eeb73c8fdf4ed518dd [2021-11-23 02:45:02,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:45:02,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:45:02,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:02,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:45:02,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:45:02,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:02" (1/1) ... [2021-11-23 02:45:02,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a484ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:02, skipping insertion in model container [2021-11-23 02:45:02,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:02" (1/1) ... [2021-11-23 02:45:02,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:45:02,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:06,104 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373299,373312] [2021-11-23 02:45:06,107 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373446,373459] [2021-11-23 02:45:06,128 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373585,373598] [2021-11-23 02:45:06,135 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373743,373756] [2021-11-23 02:45:06,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:06,277 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:45:06,745 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373299,373312] [2021-11-23 02:45:06,745 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373446,373459] [2021-11-23 02:45:06,746 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373585,373598] [2021-11-23 02:45:06,746 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_d67f7d1d-3ec9-4283-a853-fc210f954ea0/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i[373743,373756] [2021-11-23 02:45:06,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:07,063 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:45:07,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07 WrapperNode [2021-11-23 02:45:07,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:07,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:07,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:45:07,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:45:07,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,495 INFO L137 Inliner]: procedures = 469, calls = 2629, calls flagged for inlining = 277, calls inlined = 249, statements flattened = 5809 [2021-11-23 02:45:07,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:07,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:45:07,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:45:07,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:45:07,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:45:07,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:45:07,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:45:07,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:45:07,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (1/1) ... [2021-11-23 02:45:07,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:07,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:45:07,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:45:07,939 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:45:07,939 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:45:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:45:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:45:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-23 02:45:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-23 02:45:07,940 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:45:07,940 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:45:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:45:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:45:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:45:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:45:07,941 INFO L130 BoogieDeclarations]: Found specification of procedure free_tbufs [2021-11-23 02:45:07,941 INFO L138 BoogieDeclarations]: Found implementation of procedure free_tbufs [2021-11-23 02:45:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-23 02:45:07,942 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-23 02:45:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:45:07,942 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:45:07,942 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:45:07,943 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:45:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 02:45:07,943 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 02:45:07,943 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-23 02:45:07,944 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-23 02:45:07,944 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_poll [2021-11-23 02:45:07,944 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_poll [2021-11-23 02:45:07,944 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2021-11-23 02:45:07,944 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2021-11-23 02:45:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:45:07,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:45:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_wait_bit_low [2021-11-23 02:45:07,945 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_wait_bit_low [2021-11-23 02:45:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:45:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:45:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:45:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:45:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:45:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:45:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-23 02:45:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-23 02:45:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:45:07,948 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:45:07,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:45:07,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:45:07,949 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 02:45:07,949 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 02:45:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:45:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2021-11-23 02:45:07,950 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2021-11-23 02:45:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_wait_bit [2021-11-23 02:45:07,951 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_wait_bit [2021-11-23 02:45:07,951 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:45:07,951 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:45:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:45:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:45:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-23 02:45:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-23 02:45:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_rbufs [2021-11-23 02:45:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_rbufs [2021-11-23 02:45:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:45:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:45:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:45:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:45:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:45:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_interrupt [2021-11-23 02:45:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_interrupt [2021-11-23 02:45:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:45:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 02:45:07,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 02:45:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:45:07,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:45:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:45:07,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:45:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_task_disable [2021-11-23 02:45:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_task_disable [2021-11-23 02:45:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-23 02:45:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-23 02:45:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:45:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:45:07,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:45:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:45:07,958 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_set_carrier [2021-11-23 02:45:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_set_carrier [2021-11-23 02:45:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_shutdown [2021-11-23 02:45:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_shutdown [2021-11-23 02:45:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:45:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-23 02:45:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-23 02:45:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-23 02:45:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-23 02:45:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-23 02:45:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-23 02:45:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_4 [2021-11-23 02:45:07,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_4 [2021-11-23 02:45:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:45:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_nway_reset [2021-11-23 02:45:07,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_nway_reset [2021-11-23 02:45:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:45:07,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:45:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:45:07,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:45:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:45:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:45:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2021-11-23 02:45:07,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2021-11-23 02:45:07,964 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:45:07,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:45:07,966 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:45:07,967 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:45:07,967 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_set_rx_mode [2021-11-23 02:45:07,967 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_set_rx_mode [2021-11-23 02:45:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:45:07,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:45:07,968 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_update_rx_crc_and_missed_errord [2021-11-23 02:45:07,968 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_update_rx_crc_and_missed_errord [2021-11-23 02:45:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-23 02:45:07,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-23 02:45:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:45:07,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:45:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-23 02:45:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-23 02:45:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:45:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:45:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:45:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:45:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_bh [2021-11-23 02:45:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_bh [2021-11-23 02:45:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 02:45:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 02:45:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_power_init [2021-11-23 02:45:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_power_init [2021-11-23 02:45:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_tx_timeout [2021-11-23 02:45:07,978 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_tx_timeout [2021-11-23 02:45:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:45:07,978 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:45:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:45:07,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:45:07,978 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-23 02:45:07,979 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-23 02:45:07,979 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:45:07,979 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:45:07,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:45:07,979 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:45:07,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:45:07,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-23 02:45:07,980 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_chip_reset [2021-11-23 02:45:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_chip_reset [2021-11-23 02:45:07,980 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:45:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:45:07,980 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-23 02:45:07,980 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-23 02:45:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:45:07,981 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:45:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_set_cam_mask [2021-11-23 02:45:07,981 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_set_cam_mask [2021-11-23 02:45:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure init_registers [2021-11-23 02:45:07,981 INFO L138 BoogieDeclarations]: Found implementation of procedure init_registers [2021-11-23 02:45:07,981 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:45:07,982 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:45:07,982 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_remove_one [2021-11-23 02:45:07,982 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_remove_one [2021-11-23 02:45:07,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-23 02:45:07,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-23 02:45:07,982 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:45:07,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:45:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_close [2021-11-23 02:45:07,983 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_close [2021-11-23 02:45:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:45:07,983 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:45:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:45:07,983 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:45:07,984 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:45:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:45:07,984 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:45:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2021-11-23 02:45:07,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2021-11-23 02:45:07,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:45:07,985 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_check_media [2021-11-23 02:45:07,985 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_check_media [2021-11-23 02:45:07,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_rhine_cleanup_14_2 [2021-11-23 02:45:07,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_rhine_cleanup_14_2 [2021-11-23 02:45:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:45:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure free_rbufs [2021-11-23 02:45:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure free_rbufs [2021-11-23 02:45:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_get_events [2021-11-23 02:45:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_get_events [2021-11-23 02:45:07,987 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:45:07,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-23 02:45:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-23 02:45:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-23 02:45:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure enable_mmio [2021-11-23 02:45:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_mmio [2021-11-23 02:45:07,988 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_set_vlan_cam_mask [2021-11-23 02:45:07,988 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_set_vlan_cam_mask [2021-11-23 02:45:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-23 02:45:07,989 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-23 02:45:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:45:07,989 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:45:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:45:07,989 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:45:07,989 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:45:07,990 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:45:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:45:07,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:45:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:45:07,990 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:45:07,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-23 02:45:07,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-23 02:45:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:45:07,991 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:45:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:45:07,991 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:45:07,991 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_disable_linkmon [2021-11-23 02:45:07,991 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_disable_linkmon [2021-11-23 02:45:07,992 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_ack_events [2021-11-23 02:45:07,992 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_ack_events [2021-11-23 02:45:07,992 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:45:07,992 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:45:07,992 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_resume [2021-11-23 02:45:07,992 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_resume [2021-11-23 02:45:07,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:45:07,993 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:45:07,993 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:45:07,993 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:45:07,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:45:07,993 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_bh [2021-11-23 02:45:07,993 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_bh [2021-11-23 02:45:07,993 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-23 02:45:07,994 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-23 02:45:07,994 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_wait_bit_high [2021-11-23 02:45:07,994 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_wait_bit_high [2021-11-23 02:45:07,994 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_irq_disable [2021-11-23 02:45:07,995 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_irq_disable [2021-11-23 02:45:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_task_enable [2021-11-23 02:45:07,999 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_task_enable [2021-11-23 02:45:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_tbufs [2021-11-23 02:45:07,999 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_tbufs [2021-11-23 02:45:07,999 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-23 02:45:07,999 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-23 02:45:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:45:08,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:45:08,000 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-23 02:45:08,001 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-23 02:45:08,001 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-23 02:45:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-23 02:45:08,002 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_enable_linkmon [2021-11-23 02:45:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_enable_linkmon [2021-11-23 02:45:08,002 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_update_vcam [2021-11-23 02:45:08,002 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_update_vcam [2021-11-23 02:45:08,002 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:45:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:45:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-23 02:45:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-23 02:45:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:45:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_suspend [2021-11-23 02:45:08,003 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_suspend [2021-11-23 02:45:08,003 INFO L130 BoogieDeclarations]: Found specification of procedure rhine_open [2021-11-23 02:45:08,004 INFO L138 BoogieDeclarations]: Found implementation of procedure rhine_open [2021-11-23 02:45:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:45:08,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:45:08,972 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:45:08,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:45:09,202 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:54:55,686 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-23 02:54:55,762 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:55:01,374 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:55:01,375 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-23 02:55:01,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:01 BoogieIcfgContainer [2021-11-23 02:55:01,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:55:01,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:55:01,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:55:01,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:55:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:02" (1/3) ... [2021-11-23 02:55:01,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a6f029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:01, skipping insertion in model container [2021-11-23 02:55:01,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:07" (2/3) ... [2021-11-23 02:55:01,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a6f029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:01, skipping insertion in model container [2021-11-23 02:55:01,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:01" (3/3) ... [2021-11-23 02:55:01,390 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-via-via-rhine.cil.i [2021-11-23 02:55:01,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:55:01,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:55:01,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:55:01,468 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:55:01,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:55:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 1637 states, 937 states have (on average 1.3148345784418356) internal successors, (1232), 985 states have internal predecessors, (1232), 578 states have call successors, (578), 122 states have call predecessors, (578), 121 states have return successors, (569), 556 states have call predecessors, (569), 569 states have call successors, (569) [2021-11-23 02:55:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 02:55:01,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:01,559 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 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] [2021-11-23 02:55:01,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash 855893887, now seen corresponding path program 1 times [2021-11-23 02:55:01,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277053960] [2021-11-23 02:55:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:01,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-11-23 02:55:03,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:03,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277053960] [2021-11-23 02:55:03,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277053960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:03,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:03,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:03,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579684774] [2021-11-23 02:55:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:03,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:03,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:03,503 INFO L87 Difference]: Start difference. First operand has 1637 states, 937 states have (on average 1.3148345784418356) internal successors, (1232), 985 states have internal predecessors, (1232), 578 states have call successors, (578), 122 states have call predecessors, (578), 121 states have return successors, (569), 556 states have call predecessors, (569), 569 states have call successors, (569) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 02:55:05,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:12,451 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 [] [2021-11-23 02:55:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:12,574 INFO L93 Difference]: Finished difference Result 4774 states and 7021 transitions. [2021-11-23 02:55:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 163 [2021-11-23 02:55:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:12,632 INFO L225 Difference]: With dead ends: 4774 [2021-11-23 02:55:12,632 INFO L226 Difference]: Without dead ends: 3153 [2021-11-23 02:55:12,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:12,654 INFO L933 BasicCegarLoop]: 2553 mSDtfsCounter, 2261 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2261 SdHoareTripleChecker+Valid, 4532 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:12,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2261 Valid, 4532 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 715 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 02:55:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2021-11-23 02:55:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3151. [2021-11-23 02:55:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 1810 states have (on average 1.3082872928176796) internal successors, (2368), 1903 states have internal predecessors, (2368), 1100 states have call successors, (1100), 240 states have call predecessors, (1100), 239 states have return successors, (1097), 1071 states have call predecessors, (1097), 1097 states have call successors, (1097) [2021-11-23 02:55:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4565 transitions. [2021-11-23 02:55:12,999 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4565 transitions. Word has length 163 [2021-11-23 02:55:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:13,004 INFO L470 AbstractCegarLoop]: Abstraction has 3151 states and 4565 transitions. [2021-11-23 02:55:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-23 02:55:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4565 transitions. [2021-11-23 02:55:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 02:55:13,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:13,030 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:13,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:55:13,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1500129855, now seen corresponding path program 1 times [2021-11-23 02:55:13,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:13,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887392143] [2021-11-23 02:55:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:13,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-11-23 02:55:14,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887392143] [2021-11-23 02:55:14,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887392143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:14,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:14,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:14,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737579002] [2021-11-23 02:55:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:14,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:14,266 INFO L87 Difference]: Start difference. First operand 3151 states and 4565 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:55:16,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:22,201 INFO L93 Difference]: Finished difference Result 7455 states and 10773 transitions. [2021-11-23 02:55:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 179 [2021-11-23 02:55:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:22,249 INFO L225 Difference]: With dead ends: 7455 [2021-11-23 02:55:22,249 INFO L226 Difference]: Without dead ends: 4333 [2021-11-23 02:55:22,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:22,271 INFO L933 BasicCegarLoop]: 2462 mSDtfsCounter, 1955 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1955 SdHoareTripleChecker+Valid, 4419 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:22,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1955 Valid, 4419 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 742 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-23 02:55:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-11-23 02:55:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4324. [2021-11-23 02:55:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4324 states, 2497 states have (on average 1.3043652382859432) internal successors, (3257), 2623 states have internal predecessors, (3257), 1480 states have call successors, (1480), 347 states have call predecessors, (1480), 345 states have return successors, (1477), 1435 states have call predecessors, (1477), 1477 states have call successors, (1477) [2021-11-23 02:55:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 6214 transitions. [2021-11-23 02:55:22,583 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 6214 transitions. Word has length 179 [2021-11-23 02:55:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:22,584 INFO L470 AbstractCegarLoop]: Abstraction has 4324 states and 6214 transitions. [2021-11-23 02:55:22,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-23 02:55:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 6214 transitions. [2021-11-23 02:55:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 02:55:22,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:22,600 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:55:22,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1377511979, now seen corresponding path program 1 times [2021-11-23 02:55:22,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091894450] [2021-11-23 02:55:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:22,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-11-23 02:55:23,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091894450] [2021-11-23 02:55:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091894450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:23,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438720133] [2021-11-23 02:55:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:23,469 INFO L87 Difference]: Start difference. First operand 4324 states and 6214 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:55:25,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:31,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:31,506 INFO L93 Difference]: Finished difference Result 11406 states and 16399 transitions. [2021-11-23 02:55:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 191 [2021-11-23 02:55:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:31,576 INFO L225 Difference]: With dead ends: 11406 [2021-11-23 02:55:31,576 INFO L226 Difference]: Without dead ends: 7111 [2021-11-23 02:55:31,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:31,604 INFO L933 BasicCegarLoop]: 2527 mSDtfsCounter, 2196 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 4496 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:31,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 4496 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 02:55:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-11-23 02:55:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 7098. [2021-11-23 02:55:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 4097 states have (on average 1.3014400781059312) internal successors, (5332), 4316 states have internal predecessors, (5332), 2429 states have call successors, (2429), 573 states have call predecessors, (2429), 570 states have return successors, (2426), 2347 states have call predecessors, (2426), 2426 states have call successors, (2426) [2021-11-23 02:55:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 10187 transitions. [2021-11-23 02:55:32,247 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 10187 transitions. Word has length 191 [2021-11-23 02:55:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:32,250 INFO L470 AbstractCegarLoop]: Abstraction has 7098 states and 10187 transitions. [2021-11-23 02:55:32,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-23 02:55:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 10187 transitions. [2021-11-23 02:55:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 02:55:32,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:32,265 INFO L514 BasicCegarLoop]: trace histogram [18, 14, 14, 14, 14, 14, 14, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:32,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:55:32,265 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1449898087, now seen corresponding path program 1 times [2021-11-23 02:55:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:32,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686059261] [2021-11-23 02:55:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:32,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-11-23 02:55:33,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686059261] [2021-11-23 02:55:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686059261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:33,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:33,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:33,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6086651] [2021-11-23 02:55:33,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:33,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:33,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:33,283 INFO L87 Difference]: Start difference. First operand 7098 states and 10187 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:55:35,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:40,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:42,671 INFO L93 Difference]: Finished difference Result 12802 states and 18373 transitions. [2021-11-23 02:55:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:42,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 207 [2021-11-23 02:55:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:42,782 INFO L225 Difference]: With dead ends: 12802 [2021-11-23 02:55:42,782 INFO L226 Difference]: Without dead ends: 12763 [2021-11-23 02:55:42,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:42,803 INFO L933 BasicCegarLoop]: 2516 mSDtfsCounter, 2196 mSDsluCounter, 5153 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 6982 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:42,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 6982 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1038 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 02:55:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-11-23 02:55:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12725. [2021-11-23 02:55:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12725 states, 7368 states have (on average 1.3030673181324648) internal successors, (9601), 7753 states have internal predecessors, (9601), 4330 states have call successors, (4330), 1028 states have call predecessors, (4330), 1025 states have return successors, (4327), 4192 states have call predecessors, (4327), 4327 states have call successors, (4327) [2021-11-23 02:55:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12725 states to 12725 states and 18258 transitions. [2021-11-23 02:55:43,525 INFO L78 Accepts]: Start accepts. Automaton has 12725 states and 18258 transitions. Word has length 207 [2021-11-23 02:55:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:43,530 INFO L470 AbstractCegarLoop]: Abstraction has 12725 states and 18258 transitions. [2021-11-23 02:55:43,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:55:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 12725 states and 18258 transitions. [2021-11-23 02:55:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 02:55:43,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:43,553 INFO L514 BasicCegarLoop]: trace histogram [18, 14, 14, 14, 14, 14, 14, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:55:43,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:43,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1391141434, now seen corresponding path program 1 times [2021-11-23 02:55:43,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:43,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736830165] [2021-11-23 02:55:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:43,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-23 02:55:44,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736830165] [2021-11-23 02:55:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736830165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:44,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:44,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107293952] [2021-11-23 02:55:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:44,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:44,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:44,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:44,503 INFO L87 Difference]: Start difference. First operand 12725 states and 18258 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:55:46,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:51,933 INFO L93 Difference]: Finished difference Result 29535 states and 42404 transitions. [2021-11-23 02:55:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 228 [2021-11-23 02:55:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:52,053 INFO L225 Difference]: With dead ends: 29535 [2021-11-23 02:55:52,053 INFO L226 Difference]: Without dead ends: 18098 [2021-11-23 02:55:52,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:52,128 INFO L933 BasicCegarLoop]: 3576 mSDtfsCounter, 1950 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1950 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1950 Valid, 5531 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-23 02:55:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18098 states. [2021-11-23 02:55:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18098 to 18085. [2021-11-23 02:55:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18085 states, 10474 states have (on average 1.3019858697727706) internal successors, (13637), 11021 states have internal predecessors, (13637), 6138 states have call successors, (6138), 1476 states have call predecessors, (6138), 1471 states have return successors, (6135), 5936 states have call predecessors, (6135), 6135 states have call successors, (6135) [2021-11-23 02:55:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18085 states to 18085 states and 25910 transitions. [2021-11-23 02:55:53,284 INFO L78 Accepts]: Start accepts. Automaton has 18085 states and 25910 transitions. Word has length 228 [2021-11-23 02:55:53,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:53,288 INFO L470 AbstractCegarLoop]: Abstraction has 18085 states and 25910 transitions. [2021-11-23 02:55:53,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-23 02:55:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18085 states and 25910 transitions. [2021-11-23 02:55:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 02:55:53,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:53,325 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 14, 14, 14, 14, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:53,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:55:53,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 547775469, now seen corresponding path program 1 times [2021-11-23 02:55:53,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017258290] [2021-11-23 02:55:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:53,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-11-23 02:55:54,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:54,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017258290] [2021-11-23 02:55:54,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017258290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:54,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:54,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:54,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804920750] [2021-11-23 02:55:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:54,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:54,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:54,011 INFO L87 Difference]: Start difference. First operand 18085 states and 25910 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 02:55:56,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:02,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:04,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:04,791 INFO L93 Difference]: Finished difference Result 43099 states and 61787 transitions. [2021-11-23 02:56:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:56:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 252 [2021-11-23 02:56:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:04,942 INFO L225 Difference]: With dead ends: 43099 [2021-11-23 02:56:04,942 INFO L226 Difference]: Without dead ends: 26302 [2021-11-23 02:56:05,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:05,026 INFO L933 BasicCegarLoop]: 3867 mSDtfsCounter, 2196 mSDsluCounter, 2301 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 5834 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:05,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 5834 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1053 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 02:56:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26302 states. [2021-11-23 02:56:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26302 to 26281. [2021-11-23 02:56:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26281 states, 15215 states have (on average 1.3013473545842917) internal successors, (19800), 16023 states have internal predecessors, (19800), 8921 states have call successors, (8921), 2150 states have call predecessors, (8921), 2143 states have return successors, (8918), 8618 states have call predecessors, (8918), 8918 states have call successors, (8918) [2021-11-23 02:56:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26281 states to 26281 states and 37639 transitions. [2021-11-23 02:56:06,938 INFO L78 Accepts]: Start accepts. Automaton has 26281 states and 37639 transitions. Word has length 252 [2021-11-23 02:56:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 26281 states and 37639 transitions. [2021-11-23 02:56:06,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 02:56:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26281 states and 37639 transitions. [2021-11-23 02:56:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-23 02:56:06,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:06,997 INFO L514 BasicCegarLoop]: trace histogram [21, 14, 14, 14, 14, 14, 14, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:06,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:56:06,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:06,998 INFO L85 PathProgramCache]: Analyzing trace with hash -215271514, now seen corresponding path program 1 times [2021-11-23 02:56:06,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004114493] [2021-11-23 02:56:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:06,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-11-23 02:56:07,827 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004114493] [2021-11-23 02:56:07,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004114493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:07,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:07,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:56:07,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930996208] [2021-11-23 02:56:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:07,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:07,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:56:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:07,829 INFO L87 Difference]: Start difference. First operand 26281 states and 37639 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:56:09,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:14,282 INFO L93 Difference]: Finished difference Result 26301 states and 37661 transitions. [2021-11-23 02:56:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:56:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 276 [2021-11-23 02:56:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:14,421 INFO L225 Difference]: With dead ends: 26301 [2021-11-23 02:56:14,421 INFO L226 Difference]: Without dead ends: 26299 [2021-11-23 02:56:14,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:56:14,440 INFO L933 BasicCegarLoop]: 1992 mSDtfsCounter, 2254 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3982 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:14,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3982 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 694 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 02:56:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26299 states. [2021-11-23 02:56:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26299 to 26279. [2021-11-23 02:56:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26279 states, 15214 states have (on average 1.3007098724858683) internal successors, (19789), 16021 states have internal predecessors, (19789), 8921 states have call successors, (8921), 2150 states have call predecessors, (8921), 2143 states have return successors, (8918), 8618 states have call predecessors, (8918), 8918 states have call successors, (8918) [2021-11-23 02:56:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26279 states to 26279 states and 37628 transitions. [2021-11-23 02:56:16,049 INFO L78 Accepts]: Start accepts. Automaton has 26279 states and 37628 transitions. Word has length 276 [2021-11-23 02:56:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:16,050 INFO L470 AbstractCegarLoop]: Abstraction has 26279 states and 37628 transitions. [2021-11-23 02:56:16,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:56:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 26279 states and 37628 transitions. [2021-11-23 02:56:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-23 02:56:16,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:16,186 INFO L514 BasicCegarLoop]: trace histogram [26, 16, 16, 16, 16, 16, 16, 13, 13, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:16,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:56:16,187 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1312076179, now seen corresponding path program 1 times [2021-11-23 02:56:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985084062] [2021-11-23 02:56:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:16,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2021-11-23 02:56:17,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:17,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985084062] [2021-11-23 02:56:17,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985084062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:17,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:17,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:56:17,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579221270] [2021-11-23 02:56:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:17,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:56:17,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:56:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:56:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:17,365 INFO L87 Difference]: Start difference. First operand 26279 states and 37628 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 02:56:19,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:25,429 INFO L93 Difference]: Finished difference Result 43281 states and 62741 transitions. [2021-11-23 02:56:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:56:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 503 [2021-11-23 02:56:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:25,715 INFO L225 Difference]: With dead ends: 43281 [2021-11-23 02:56:25,715 INFO L226 Difference]: Without dead ends: 30548 [2021-11-23 02:56:25,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:25,761 INFO L933 BasicCegarLoop]: 2766 mSDtfsCounter, 552 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 4952 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:25,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 4952 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:56:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30548 states. [2021-11-23 02:56:27,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30548 to 26285. [2021-11-23 02:56:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26285 states, 15220 states have (on average 1.3005913272010512) internal successors, (19795), 16027 states have internal predecessors, (19795), 8921 states have call successors, (8921), 2150 states have call predecessors, (8921), 2143 states have return successors, (8918), 8618 states have call predecessors, (8918), 8918 states have call successors, (8918) [2021-11-23 02:56:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26285 states to 26285 states and 37634 transitions. [2021-11-23 02:56:27,235 INFO L78 Accepts]: Start accepts. Automaton has 26285 states and 37634 transitions. Word has length 503 [2021-11-23 02:56:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:27,236 INFO L470 AbstractCegarLoop]: Abstraction has 26285 states and 37634 transitions. [2021-11-23 02:56:27,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 02:56:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26285 states and 37634 transitions. [2021-11-23 02:56:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-11-23 02:56:27,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:27,359 INFO L514 BasicCegarLoop]: trace histogram [26, 16, 16, 16, 16, 16, 16, 13, 13, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:27,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:56:27,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2033513975, now seen corresponding path program 1 times [2021-11-23 02:56:27,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55496358] [2021-11-23 02:56:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:27,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2021-11-23 02:56:28,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:28,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55496358] [2021-11-23 02:56:28,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55496358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:28,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:28,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:56:28,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524436544] [2021-11-23 02:56:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:28,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:56:28,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:56:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:56:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:28,626 INFO L87 Difference]: Start difference. First operand 26285 states and 37634 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-23 02:56:30,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:34,895 INFO L93 Difference]: Finished difference Result 39126 states and 56069 transitions. [2021-11-23 02:56:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:56:34,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 508 [2021-11-23 02:56:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:35,024 INFO L225 Difference]: With dead ends: 39126 [2021-11-23 02:56:35,024 INFO L226 Difference]: Without dead ends: 26471 [2021-11-23 02:56:35,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:56:35,077 INFO L933 BasicCegarLoop]: 2000 mSDtfsCounter, 21 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3988 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:35,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 3988 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 695 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:56:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26471 states. [2021-11-23 02:56:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26471 to 26291. [2021-11-23 02:56:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26291 states, 15226 states have (on average 1.300472875344805) internal successors, (19801), 16033 states have internal predecessors, (19801), 8921 states have call successors, (8921), 2150 states have call predecessors, (8921), 2143 states have return successors, (8918), 8618 states have call predecessors, (8918), 8918 states have call successors, (8918) [2021-11-23 02:56:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26291 states to 26291 states and 37640 transitions. [2021-11-23 02:56:36,368 INFO L78 Accepts]: Start accepts. Automaton has 26291 states and 37640 transitions. Word has length 508 [2021-11-23 02:56:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:36,369 INFO L470 AbstractCegarLoop]: Abstraction has 26291 states and 37640 transitions. [2021-11-23 02:56:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-23 02:56:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26291 states and 37640 transitions. [2021-11-23 02:56:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-11-23 02:56:36,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:36,464 INFO L514 BasicCegarLoop]: trace histogram [26, 16, 16, 16, 16, 16, 16, 13, 13, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:36,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:56:36,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_return_value_probeErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:56:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:36,465 INFO L85 PathProgramCache]: Analyzing trace with hash 326794659, now seen corresponding path program 1 times [2021-11-23 02:56:36,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:56:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746154211] [2021-11-23 02:56:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:36,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:56:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1700 trivial. 0 not checked. [2021-11-23 02:56:37,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:56:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746154211] [2021-11-23 02:56:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746154211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:56:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565708038] [2021-11-23 02:56:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:37,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:37,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67f7d1d-3ec9-4283-a853-fc210f954ea0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:56:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 5138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2021-11-23 02:56:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1700 trivial. 0 not checked. [2021-11-23 02:56:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565708038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:41,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667242576] [2021-11-23 02:56:41,786 INFO L159 IcfgInterpreter]: Started Sifa with 260 locations of interest [2021-11-23 02:56:41,786 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:56:41,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:56:41,826 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:56:41,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs