./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:23,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:23,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:23,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:23,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:23,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:23,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:23,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:23,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:23,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:23,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:23,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:23,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:23,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:23,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:23,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:23,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:23,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:23,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:23,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:23,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:23,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:23,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:23,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:23,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:23,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:23,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:23,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:23,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:23,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:23,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:23,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:23,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:23,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:23,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:23,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:23,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:23,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:23,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:23,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:23,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:23,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:55:24,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:24,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:24,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:24,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:24,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:24,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:24,021 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:24,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:24,022 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:24,022 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:55:24,024 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:24,024 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:24,024 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:55:24,024 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:55:24,025 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:24,025 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:55:24,025 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:55:24,026 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:55:24,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:55:24,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:55:24,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:24,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:24,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:55:24,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:24,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:24,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:24,030 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:55:24,031 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:55:24,031 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:55:24,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:24,032 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:55:24,032 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:24,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:24,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:24,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:24,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:24,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:24,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:24,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:55:24,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:55:24,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:24,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:24,035 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 [2021-11-23 02:55:24,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:24,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:24,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:24,416 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:24,417 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:24,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2021-11-23 02:55:24,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/595d44dcd/7ccac22050854b0fa5b420f024659f64/FLAG7aa0a843f [2021-11-23 02:55:25,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:25,415 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2021-11-23 02:55:25,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/595d44dcd/7ccac22050854b0fa5b420f024659f64/FLAG7aa0a843f [2021-11-23 02:55:25,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/595d44dcd/7ccac22050854b0fa5b420f024659f64 [2021-11-23 02:55:25,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:25,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:25,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:25,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:25,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:25,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:25" (1/1) ... [2021-11-23 02:55:25,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b63605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:25, skipping insertion in model container [2021-11-23 02:55:25,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:25" (1/1) ... [2021-11-23 02:55:25,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:25,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:25,978 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2021-11-23 02:55:27,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:27,529 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-23 02:55:27,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7110ce69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:27, skipping insertion in model container [2021-11-23 02:55:27,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:27,530 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 02:55:27,535 INFO L158 Benchmark]: Toolchain (without parser) took 2027.59ms. Allocated memory was 90.2MB in the beginning and 121.6MB in the end (delta: 31.5MB). Free memory was 50.9MB in the beginning and 67.1MB in the end (delta: -16.2MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2021-11-23 02:55:27,537 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:55:27,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2022.36ms. Allocated memory was 90.2MB in the beginning and 121.6MB in the end (delta: 31.5MB). Free memory was 50.6MB in the beginning and 67.1MB in the end (delta: -16.5MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2021-11-23 02:55:27,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 61.9MB in the beginning and 61.9MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2022.36ms. Allocated memory was 90.2MB in the beginning and 121.6MB in the end (delta: 31.5MB). Free memory was 50.6MB in the beginning and 67.1MB in the end (delta: -16.5MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2977]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:30,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:30,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:30,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:30,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:30,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:30,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:30,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:30,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:30,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:30,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:30,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:30,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:30,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:30,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:30,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:30,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:30,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:30,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:30,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:30,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:30,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:30,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:30,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:30,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:30,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:30,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:30,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:30,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:30,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:30,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:30,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:30,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:30,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:30,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:30,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:30,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:30,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:30,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:30,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:30,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:30,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:55:30,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:30,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:30,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:30,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:30,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:30,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:30,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:30,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:30,541 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:30,542 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:30,543 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:30,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:30,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:55:30,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:55:30,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:30,546 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:30,546 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:55:30,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:30,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:30,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:30,547 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:55:30,548 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:55:30,548 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:55:30,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:30,549 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:55:30,549 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:55:30,549 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:55:30,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:30,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:30,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:30,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:55:30,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:30,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:30,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:30,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:30,552 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:55:30,553 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:55:30,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:30,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:30,569 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aba0d481dbad425b1cb3ce4949768f5bfa91a070fed6a0c2b192c70ad920fc2 [2021-11-23 02:55:31,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:31,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:31,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:31,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:31,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:31,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2021-11-23 02:55:31,158 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/daa6ecd7b/13e133a844c843ff988f0d70bb372b3e/FLAG9f3aa6eaa [2021-11-23 02:55:32,146 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:32,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i [2021-11-23 02:55:32,184 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/daa6ecd7b/13e133a844c843ff988f0d70bb372b3e/FLAG9f3aa6eaa [2021-11-23 02:55:32,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/data/daa6ecd7b/13e133a844c843ff988f0d70bb372b3e [2021-11-23 02:55:32,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:32,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:32,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:32,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:32,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:32,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:32" (1/1) ... [2021-11-23 02:55:32,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e66f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:32, skipping insertion in model container [2021-11-23 02:55:32,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:32" (1/1) ... [2021-11-23 02:55:32,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:32,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:33,110 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2021-11-23 02:55:34,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:34,644 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:55:34,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:34,677 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2021-11-23 02:55:35,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:35,056 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:55:35,071 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_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_pthread_mutex_unlock.i[472,485] [2021-11-23 02:55:35,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:35,541 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:55:35,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35 WrapperNode [2021-11-23 02:55:35,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:35,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:35,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:55:35,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:55:35,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,805 INFO L137 Inliner]: procedures = 482, calls = 840, calls flagged for inlining = 54, calls inlined = 37, statements flattened = 970 [2021-11-23 02:55:35,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:35,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:55:35,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:55:35,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:55:35,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:55:35,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:55:35,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:55:35,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:55:35,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (1/1) ... [2021-11-23 02:55:35,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:36,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:55:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:55:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2021-11-23 02:55:36,098 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2021-11-23 02:55:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-23 02:55:36,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-23 02:55:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 02:55:36,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2021-11-23 02:55:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:55:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:55:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:55:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-23 02:55:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:55:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 02:55:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:55:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:55:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 02:55:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2021-11-23 02:55:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2021-11-23 02:55:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2021-11-23 02:55:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-23 02:55:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-23 02:55:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:55:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2021-11-23 02:55:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2021-11-23 02:55:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:55:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:55:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:55:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:55:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2021-11-23 02:55:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2021-11-23 02:55:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2021-11-23 02:55:36,104 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2021-11-23 02:55:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:55:36,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:55:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2021-11-23 02:55:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2021-11-23 02:55:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 02:55:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:55:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 02:55:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:55:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:55:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:55:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-23 02:55:36,107 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-23 02:55:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:55:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:55:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-23 02:55:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-23 02:55:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 02:55:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2021-11-23 02:55:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2021-11-23 02:55:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 02:55:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-23 02:55:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:55:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:55:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2021-11-23 02:55:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2021-11-23 02:55:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-23 02:55:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-23 02:55:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:55:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:55:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-11-23 02:55:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-11-23 02:55:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2021-11-23 02:55:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2021-11-23 02:55:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2021-11-23 02:55:36,113 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2021-11-23 02:55:36,113 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-23 02:55:36,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-23 02:55:36,114 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2021-11-23 02:55:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2021-11-23 02:55:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 02:55:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2021-11-23 02:55:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2021-11-23 02:55:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:55:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:55:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-23 02:55:36,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-23 02:55:36,569 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:55:36,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:55:43,320 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:55:43,353 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:55:43,354 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:55:43,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:43 BoogieIcfgContainer [2021-11-23 02:55:43,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:55:43,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:55:43,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:55:43,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:55:43,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:32" (1/3) ... [2021-11-23 02:55:43,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aabc540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:43, skipping insertion in model container [2021-11-23 02:55:43,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:35" (2/3) ... [2021-11-23 02:55:43,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aabc540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:43, skipping insertion in model container [2021-11-23 02:55:43,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:43" (3/3) ... [2021-11-23 02:55:43,384 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_pthread_mutex_unlock.i [2021-11-23 02:55:43,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:55:43,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 205 error locations. [2021-11-23 02:55:43,463 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:55:43,473 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 02:55:43,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 205 error locations. [2021-11-23 02:55:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-23 02:55:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:55:43,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:43,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:55:43,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:55:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash 333908101, now seen corresponding path program 1 times [2021-11-23 02:55:43,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582062278] [2021-11-23 02:55:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:43,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:43,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:43,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:55:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:55:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:44,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:44,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582062278] [2021-11-23 02:55:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582062278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:44,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:44,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:55:44,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995607248] [2021-11-23 02:55:44,304 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:44,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:55:44,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:55:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:55:44,359 INFO L87 Difference]: Start difference. First operand has 666 states, 356 states have (on average 1.8202247191011236) internal successors, (648), 566 states have internal predecessors, (648), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:46,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:48,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:50,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:55,391 INFO L93 Difference]: Finished difference Result 1203 states and 1442 transitions. [2021-11-23 02:55:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 02:55:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:55,418 INFO L225 Difference]: With dead ends: 1203 [2021-11-23 02:55:55,418 INFO L226 Difference]: Without dead ends: 1199 [2021-11-23 02:55:55,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:55:55,423 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 695 mSDsluCounter, 2850 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:55,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 3608 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1677 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:55:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-23 02:55:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 986. [2021-11-23 02:55:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 594 states have (on average 1.8013468013468013) internal successors, (1070), 813 states have internal predecessors, (1070), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2021-11-23 02:55:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1346 transitions. [2021-11-23 02:55:55,567 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1346 transitions. Word has length 5 [2021-11-23 02:55:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1346 transitions. [2021-11-23 02:55:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1346 transitions. [2021-11-23 02:55:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:55:55,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:55,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:55:55,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 02:55:55,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:55:55,789 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:55:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 333908102, now seen corresponding path program 1 times [2021-11-23 02:55:55,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:55:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281913562] [2021-11-23 02:55:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:55,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:55:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:55:55,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:55:55,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:55:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:56,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:55:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:56,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:56,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:55:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281913562] [2021-11-23 02:55:56,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281913562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:56,515 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:56,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:55:56,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541763156] [2021-11-23 02:55:56,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:55:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:55:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:55:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:55:56,517 INFO L87 Difference]: Start difference. First operand 986 states and 1346 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:58,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:00,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:02,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:10,112 INFO L93 Difference]: Finished difference Result 1343 states and 1686 transitions. [2021-11-23 02:56:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:56:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 02:56:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:10,126 INFO L225 Difference]: With dead ends: 1343 [2021-11-23 02:56:10,127 INFO L226 Difference]: Without dead ends: 1343 [2021-11-23 02:56:10,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:56:10,128 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 764 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:10,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 3376 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1462 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 02:56:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-11-23 02:56:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1209. [2021-11-23 02:56:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 962 states have internal predecessors, (1300), 184 states have call successors, (184), 80 states have call predecessors, (184), 80 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2021-11-23 02:56:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1668 transitions. [2021-11-23 02:56:10,197 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1668 transitions. Word has length 5 [2021-11-23 02:56:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1668 transitions. [2021-11-23 02:56:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:56:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1668 transitions. [2021-11-23 02:56:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:56:10,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:10,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:10,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:56:10,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:10,414 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:56:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash -863937403, now seen corresponding path program 1 times [2021-11-23 02:56:10,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:10,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679745379] [2021-11-23 02:56:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:10,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:10,416 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:10,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:56:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:10,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:10,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:10,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:10,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679745379] [2021-11-23 02:56:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679745379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:10,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 2] imperfect sequences [] total 3 [2021-11-23 02:56:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334262060] [2021-11-23 02:56:10,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:10,900 INFO L87 Difference]: Start difference. First operand 1209 states and 1668 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:14,452 INFO L93 Difference]: Finished difference Result 2047 states and 2548 transitions. [2021-11-23 02:56:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:56:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-23 02:56:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:14,469 INFO L225 Difference]: With dead ends: 2047 [2021-11-23 02:56:14,469 INFO L226 Difference]: Without dead ends: 2047 [2021-11-23 02:56:14,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:56:14,471 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 1286 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 2248 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 02:56:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-11-23 02:56:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1617. [2021-11-23 02:56:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1036 states have (on average 1.750965250965251) internal successors, (1814), 1266 states have internal predecessors, (1814), 267 states have call successors, (267), 114 states have call predecessors, (267), 114 states have return successors, (267), 252 states have call predecessors, (267), 267 states have call successors, (267) [2021-11-23 02:56:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2348 transitions. [2021-11-23 02:56:14,561 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2348 transitions. Word has length 11 [2021-11-23 02:56:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:14,562 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 2348 transitions. [2021-11-23 02:56:14,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2348 transitions. [2021-11-23 02:56:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:56:14,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:14,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:14,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 02:56:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:14,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:56:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash -863937402, now seen corresponding path program 1 times [2021-11-23 02:56:14,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:14,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664769106] [2021-11-23 02:56:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:14,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:14,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:56:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:15,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664769106] [2021-11-23 02:56:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664769106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:15,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:56:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 5 [2021-11-23 02:56:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580902898] [2021-11-23 02:56:15,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:56:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:56:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:56:15,572 INFO L87 Difference]: Start difference. First operand 1617 states and 2348 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:17,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:19,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:27,596 INFO L93 Difference]: Finished difference Result 1889 states and 2538 transitions. [2021-11-23 02:56:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-23 02:56:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:27,611 INFO L225 Difference]: With dead ends: 1889 [2021-11-23 02:56:27,611 INFO L226 Difference]: Without dead ends: 1889 [2021-11-23 02:56:27,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:56:27,613 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 831 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 3296 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:27,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 3296 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1424 Invalid, 2 Unknown, 0 Unchecked, 11.9s Time] [2021-11-23 02:56:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-11-23 02:56:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1623. [2021-11-23 02:56:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1042 states have (on average 1.7476007677543186) internal successors, (1821), 1272 states have internal predecessors, (1821), 267 states have call successors, (267), 114 states have call predecessors, (267), 114 states have return successors, (267), 252 states have call predecessors, (267), 267 states have call successors, (267) [2021-11-23 02:56:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2355 transitions. [2021-11-23 02:56:27,705 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2355 transitions. Word has length 11 [2021-11-23 02:56:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:27,706 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2355 transitions. [2021-11-23 02:56:27,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2355 transitions. [2021-11-23 02:56:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:56:27,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:27,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:27,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:27,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:56:27,930 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:56:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash -833526471, now seen corresponding path program 1 times [2021-11-23 02:56:27,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:27,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139201388] [2021-11-23 02:56:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:27,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:27,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:27,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:27,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:56:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:28,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:28,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:28,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139201388] [2021-11-23 02:56:28,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139201388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:28,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [358534453] [2021-11-23 02:56:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:28,401 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:28,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:28,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 02:56:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:29,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [358534453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310645696] [2021-11-23 02:56:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:29,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:29,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:29,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:56:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:56:29,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:56:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310645696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:29,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:56:29,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 2] imperfect sequences [4, 4, 4, 4] total 8 [2021-11-23 02:56:29,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119340864] [2021-11-23 02:56:29,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:56:29,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:56:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:56:29,586 INFO L87 Difference]: Start difference. First operand 1623 states and 2355 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:32,280 INFO L93 Difference]: Finished difference Result 2811 states and 3794 transitions. [2021-11-23 02:56:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:56:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 02:56:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:32,300 INFO L225 Difference]: With dead ends: 2811 [2021-11-23 02:56:32,300 INFO L226 Difference]: Without dead ends: 2811 [2021-11-23 02:56:32,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:56:32,304 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 1773 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:32,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1665 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:56:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-11-23 02:56:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2399. [2021-11-23 02:56:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 1592 states have (on average 1.7160804020100502) internal successors, (2732), 1840 states have internal predecessors, (2732), 431 states have call successors, (431), 184 states have call predecessors, (431), 184 states have return successors, (431), 400 states have call predecessors, (431), 431 states have call successors, (431) [2021-11-23 02:56:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3594 transitions. [2021-11-23 02:56:32,412 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3594 transitions. Word has length 16 [2021-11-23 02:56:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:32,412 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 3594 transitions. [2021-11-23 02:56:32,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3594 transitions. [2021-11-23 02:56:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:56:32,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:32,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:32,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:32,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 02:56:32,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 02:56:33,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:33,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:56:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash -833526470, now seen corresponding path program 1 times [2021-11-23 02:56:33,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:33,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532394328] [2021-11-23 02:56:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:33,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:33,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:33,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:56:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:33,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:33,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532394328] [2021-11-23 02:56:33,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532394328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:33,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768176699] [2021-11-23 02:56:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:33,413 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:33,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:33,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 02:56:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:56:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:33,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:33,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768176699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:33,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591560856] [2021-11-23 02:56:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:33,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:33,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:33,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:33,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:56:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:34,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:56:34,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:56:34,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:56:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591560856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:56:34,868 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:56:34,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [4, 4, 4, 4] total 10 [2021-11-23 02:56:34,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096010624] [2021-11-23 02:56:34,869 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:56:34,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:56:34,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:56:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:56:34,871 INFO L87 Difference]: Start difference. First operand 2399 states and 3594 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:36,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:38,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:56:45,304 INFO L93 Difference]: Finished difference Result 2526 states and 3625 transitions. [2021-11-23 02:56:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:56:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-23 02:56:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:56:45,324 INFO L225 Difference]: With dead ends: 2526 [2021-11-23 02:56:45,324 INFO L226 Difference]: Without dead ends: 2526 [2021-11-23 02:56:45,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:56:45,326 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 557 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:56:45,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 2685 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1104 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 02:56:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-11-23 02:56:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2401. [2021-11-23 02:56:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 1594 states have (on average 1.7151819322459223) internal successors, (2734), 1842 states have internal predecessors, (2734), 431 states have call successors, (431), 184 states have call predecessors, (431), 184 states have return successors, (431), 400 states have call predecessors, (431), 431 states have call successors, (431) [2021-11-23 02:56:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3596 transitions. [2021-11-23 02:56:45,433 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3596 transitions. Word has length 16 [2021-11-23 02:56:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:56:45,433 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 3596 transitions. [2021-11-23 02:56:45,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3596 transitions. [2021-11-23 02:56:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:56:45,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:56:45,435 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:56:45,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:45,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:45,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:56:46,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:46,049 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:56:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:56:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -67919898, now seen corresponding path program 1 times [2021-11-23 02:56:46,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:56:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737500997] [2021-11-23 02:56:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:56:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:56:46,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:56:46,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:56:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:56:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:46,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:47,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:56:47,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737500997] [2021-11-23 02:56:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737500997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049350856] [2021-11-23 02:56:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:47,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:56:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:56:47,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:56:47,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 02:56:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:48,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:56:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:48,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:48,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049350856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:48,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705298665] [2021-11-23 02:56:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:56:48,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:56:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:56:48,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:56:48,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:56:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:56:49,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:56:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:56:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:56:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:56:49,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705298665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:56:49,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:56:49,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 9 [2021-11-23 02:56:49,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686806377] [2021-11-23 02:56:49,533 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:56:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:56:49,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:56:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:56:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:56:49,534 INFO L87 Difference]: Start difference. First operand 2401 states and 3596 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:56:51,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:53,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:56:55,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:57:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:57:06,953 INFO L93 Difference]: Finished difference Result 2998 states and 4330 transitions. [2021-11-23 02:57:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:57:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-23 02:57:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:57:06,976 INFO L225 Difference]: With dead ends: 2998 [2021-11-23 02:57:06,976 INFO L226 Difference]: Without dead ends: 2998 [2021-11-23 02:57:06,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:57:06,978 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 1505 mSDsluCounter, 2439 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 210 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:57:06,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 3266 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1506 Invalid, 3 Unknown, 0 Unchecked, 16.7s Time] [2021-11-23 02:57:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2021-11-23 02:57:07,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2510. [2021-11-23 02:57:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 1666 states have (on average 1.702280912364946) internal successors, (2836), 1916 states have internal predecessors, (2836), 456 states have call successors, (456), 198 states have call predecessors, (456), 198 states have return successors, (456), 422 states have call predecessors, (456), 456 states have call successors, (456) [2021-11-23 02:57:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3748 transitions. [2021-11-23 02:57:07,105 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3748 transitions. Word has length 17 [2021-11-23 02:57:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:57:07,106 INFO L470 AbstractCegarLoop]: Abstraction has 2510 states and 3748 transitions. [2021-11-23 02:57:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:57:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3748 transitions. [2021-11-23 02:57:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:57:07,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:57:07,108 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:57:07,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:07,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:07,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:57:07,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:07,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:57:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:57:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1241117018, now seen corresponding path program 2 times [2021-11-23 02:57:07,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:57:07,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524541782] [2021-11-23 02:57:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:57:07,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:57:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:57:07,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:57:07,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:57:08,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:57:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:57:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:57:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:08,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:10,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:57:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524541782] [2021-11-23 02:57:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524541782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1027179375] [2021-11-23 02:57:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:57:10,916 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:57:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:57:10,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:57:10,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 02:57:12,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:57:12,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:57:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:57:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:12,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:14,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1027179375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63982407] [2021-11-23 02:57:14,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:57:14,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:57:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:57:14,895 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:57:14,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:57:34,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:57:34,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:57:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:57:34,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:57:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:57:37,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63982407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:57:37,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:57:37,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 9, 8, 10] total 30 [2021-11-23 02:57:37,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612140175] [2021-11-23 02:57:37,654 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:57:37,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:57:37,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:57:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:57:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:57:37,657 INFO L87 Difference]: Start difference. First operand 2510 states and 3748 transitions. Second operand has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:57:39,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:57:41,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:57:43,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:59:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:08,456 INFO L93 Difference]: Finished difference Result 3501 states and 4875 transitions. [2021-11-23 02:59:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:59:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-11-23 02:59:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:08,506 INFO L225 Difference]: With dead ends: 3501 [2021-11-23 02:59:08,506 INFO L226 Difference]: Without dead ends: 3501 [2021-11-23 02:59:08,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:59:08,509 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 4225 mSDsluCounter, 12990 mSDsCounter, 0 mSdLazyCounter, 11048 mSolverCounterSat, 602 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4237 SdHoareTripleChecker+Valid, 13726 SdHoareTripleChecker+Invalid, 11653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 11048 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:08,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4237 Valid, 13726 Invalid, 11653 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [602 Valid, 11048 Invalid, 3 Unknown, 0 Unchecked, 77.6s Time] [2021-11-23 02:59:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2021-11-23 02:59:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2572. [2021-11-23 02:59:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 1728 states have (on average 1.7008101851851851) internal successors, (2939), 1973 states have internal predecessors, (2939), 456 states have call successors, (456), 198 states have call predecessors, (456), 198 states have return successors, (456), 427 states have call predecessors, (456), 456 states have call successors, (456) [2021-11-23 02:59:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3851 transitions. [2021-11-23 02:59:08,623 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3851 transitions. Word has length 29 [2021-11-23 02:59:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 2572 states and 3851 transitions. [2021-11-23 02:59:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:59:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3851 transitions. [2021-11-23 02:59:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:59:08,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:08,627 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:08,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:59:08,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:59:09,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:59:09,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:59:09,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 201 more)] === [2021-11-23 02:59:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash 495619110, now seen corresponding path program 3 times [2021-11-23 02:59:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:59:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548100344] [2021-11-23 02:59:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:59:09,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:59:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:59:09,254 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:59:09,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 02:59:10,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:59:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:59:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:59:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:59:10,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:59:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:59:11,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:59:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548100344] [2021-11-23 02:59:11,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548100344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:59:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148980949] [2021-11-23 02:59:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:59:11,491 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:59:11,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:59:11,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:59:11,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 02:59:14,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:59:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:59:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:59:14,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 105 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:59:16,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:59:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:59:41,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148980949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:59:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179299498] [2021-11-23 02:59:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:59:41,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:41,273 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:41,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1cab7f-9b73-41d5-a5c9-cc162de682f2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process