./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.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_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/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_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/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_46921938-ce24-40e8-b634-f64ac9342a79/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 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:41:05,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:41:05,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:41:05,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:41:05,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:41:05,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:41:05,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:41:05,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:41:05,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:41:05,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:41:05,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:41:05,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:41:05,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:41:05,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:41:05,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:41:05,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:41:05,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:41:05,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:41:05,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:41:05,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:41:05,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:41:05,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:41:05,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:41:05,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:41:05,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:41:05,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:41:05,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:41:05,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:41:05,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:41:05,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:41:05,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:41:05,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:41:05,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:41:05,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:41:05,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:41:05,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:41:05,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:41:05,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:41:05,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:41:05,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:41:05,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:41:05,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:41:05,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:41:05,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:41:05,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:41:05,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:41:05,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:41:05,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:41:05,520 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:41:05,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:41:05,520 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:41:05,521 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:41:05,521 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:41:05,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:41:05,522 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:41:05,522 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:41:05,522 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:41:05,523 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:41:05,523 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:41:05,523 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:41:05,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:41:05,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:41:05,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:41:05,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:41:05,525 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:41:05,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:41:05,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:41:05,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:41:05,527 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:41:05,527 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:41:05,531 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:41:05,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:41:05,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:41:05,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:41:05,532 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:41:05,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:41:05,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:41:05,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:41:05,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:41:05,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:41:05,534 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:41:05,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:41:05,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:41:05,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:41:05,535 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_46921938-ce24-40e8-b634-f64ac9342a79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de [2021-11-23 03:41:05,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:41:05,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:41:05,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:41:05,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:41:05,879 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:41:05,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2021-11-23 03:41:05,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/56bc917c7/dab55981a2ad4f0082a4777fd4f1f382/FLAG8dd2038b4 [2021-11-23 03:41:06,785 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:41:06,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2021-11-23 03:41:06,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/56bc917c7/dab55981a2ad4f0082a4777fd4f1f382/FLAG8dd2038b4 [2021-11-23 03:41:06,901 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/56bc917c7/dab55981a2ad4f0082a4777fd4f1f382 [2021-11-23 03:41:06,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:41:06,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:41:06,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:06,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:41:06,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:41:06,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:06" (1/1) ... [2021-11-23 03:41:06,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e7d35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:06, skipping insertion in model container [2021-11-23 03:41:06,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:06" (1/1) ... [2021-11-23 03:41:06,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:41:07,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:41:07,249 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_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2021-11-23 03:41:08,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:08,473 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 03:41:08,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bf262fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:08, skipping insertion in model container [2021-11-23 03:41:08,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:08,474 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 03:41:08,477 INFO L158 Benchmark]: Toolchain (without parser) took 1568.54ms. Allocated memory is still 111.1MB. Free memory was 73.4MB in the beginning and 57.6MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-23 03:41:08,479 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 36.7MB in the beginning and 36.7MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:41:08,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1564.03ms. Allocated memory is still 111.1MB. Free memory was 73.2MB in the beginning and 57.6MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:41:08,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 81.8MB. Free memory was 36.7MB in the beginning and 36.7MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1564.03ms. Allocated memory is still 111.1MB. Free memory was 73.2MB in the beginning and 57.6MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2976]: 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_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/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_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/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_46921938-ce24-40e8-b634-f64ac9342a79/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 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:41:10,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:41:10,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:41:10,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:41:10,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:41:10,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:41:10,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:41:10,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:41:10,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:41:10,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:41:10,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:41:10,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:41:10,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:41:10,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:41:10,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:41:10,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:41:10,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:41:10,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:41:10,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:41:10,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:41:10,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:41:10,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:41:10,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:41:10,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:41:10,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:41:10,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:41:10,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:41:10,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:41:10,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:41:10,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:41:10,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:41:10,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:41:10,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:41:10,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:41:10,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:41:10,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:41:10,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:41:10,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:41:10,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:41:10,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:41:10,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:41:10,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 03:41:11,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:41:11,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:41:11,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:41:11,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:41:11,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:41:11,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:41:11,030 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:41:11,030 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:41:11,030 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:41:11,031 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:41:11,032 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:41:11,032 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:41:11,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:41:11,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:41:11,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:41:11,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:41:11,035 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:41:11,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:41:11,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:41:11,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:41:11,036 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:41:11,036 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:41:11,036 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:41:11,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:41:11,036 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:41:11,037 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:41:11,037 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:41:11,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:41:11,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:41:11,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:41:11,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:41:11,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:41:11,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:41:11,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:41:11,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:41:11,040 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:41:11,040 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:41:11,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:41:11,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:41:11,041 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_46921938-ce24-40e8-b634-f64ac9342a79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de [2021-11-23 03:41:11,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:41:11,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:41:11,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:41:11,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:41:11,507 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:41:11,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2021-11-23 03:41:11,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/e12114725/88afafada6ca49fab36a3ea8871d2ed3/FLAGbb8c84385 [2021-11-23 03:41:12,424 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:41:12,425 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2021-11-23 03:41:12,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/e12114725/88afafada6ca49fab36a3ea8871d2ed3/FLAGbb8c84385 [2021-11-23 03:41:12,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/data/e12114725/88afafada6ca49fab36a3ea8871d2ed3 [2021-11-23 03:41:12,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:41:12,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:41:12,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:12,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:41:12,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:41:12,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:12" (1/1) ... [2021-11-23 03:41:12,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ba4042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:12, skipping insertion in model container [2021-11-23 03:41:12,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:41:12" (1/1) ... [2021-11-23 03:41:13,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:41:13,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:41:13,315 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_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2021-11-23 03:41:14,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:15,018 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:41:15,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:41:15,039 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_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2021-11-23 03:41:15,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:15,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:41:15,213 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_46921938-ce24-40e8-b634-f64ac9342a79/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2021-11-23 03:41:15,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:41:15,547 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:41:15,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15 WrapperNode [2021-11-23 03:41:15,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:41:15,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:41:15,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:41:15,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:41:15,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,731 INFO L137 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 979 [2021-11-23 03:41:15,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:41:15,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:41:15,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:41:15,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:41:15,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:41:15,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:41:15,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:41:15,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:41:15,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (1/1) ... [2021-11-23 03:41:15,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:41:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:15,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:41:15,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:41:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2021-11-23 03:41:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2021-11-23 03:41:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-23 03:41:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2021-11-23 03:41:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 03:41:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2021-11-23 03:41:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:41:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:41:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:41:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-23 03:41:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:41:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 03:41:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:41:15,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:41:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 03:41:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2021-11-23 03:41:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2021-11-23 03:41:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2021-11-23 03:41:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-23 03:41:15,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-23 03:41:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:41:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2021-11-23 03:41:15,992 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2021-11-23 03:41:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:41:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:41:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:41:15,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:41:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2021-11-23 03:41:15,993 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2021-11-23 03:41:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2021-11-23 03:41:15,993 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2021-11-23 03:41:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:41:15,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:41:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2021-11-23 03:41:15,994 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2021-11-23 03:41:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-23 03:41:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 03:41:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-23 03:41:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:41:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:41:15,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:41:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-23 03:41:15,996 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-23 03:41:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:41:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:41:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-23 03:41:15,998 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-23 03:41:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-23 03:41:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2021-11-23 03:41:15,999 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2021-11-23 03:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 03:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-23 03:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 03:41:16,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2021-11-23 03:41:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2021-11-23 03:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-23 03:41:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-23 03:41:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 03:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 03:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-11-23 03:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-11-23 03:41:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2021-11-23 03:41:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2021-11-23 03:41:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2021-11-23 03:41:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2021-11-23 03:41:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-23 03:41:16,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2021-11-23 03:41:16,004 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2021-11-23 03:41:16,004 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2021-11-23 03:41:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-23 03:41:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2021-11-23 03:41:16,005 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2021-11-23 03:41:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 03:41:16,005 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 03:41:16,005 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-23 03:41:16,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-23 03:41:16,397 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:41:16,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:41:22,266 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:41:22,291 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:41:22,291 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 03:41:22,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:22 BoogieIcfgContainer [2021-11-23 03:41:22,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:41:22,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:41:22,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:41:22,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:41:22,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:41:12" (1/3) ... [2021-11-23 03:41:22,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c79bd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:22, skipping insertion in model container [2021-11-23 03:41:22,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:41:15" (2/3) ... [2021-11-23 03:41:22,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c79bd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:41:22, skipping insertion in model container [2021-11-23 03:41:22,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:41:22" (3/3) ... [2021-11-23 03:41:22,317 INFO L111 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_inw.i [2021-11-23 03:41:22,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:41:22,324 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 206 error locations. [2021-11-23 03:41:22,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:41:22,387 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 03:41:22,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 206 error locations. [2021-11-23 03:41:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 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 03:41:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:41:22,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:22,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:41:22,437 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 202 more)] === [2021-11-23 03:41:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash 346313650, now seen corresponding path program 1 times [2021-11-23 03:41:22,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:41:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855564207] [2021-11-23 03:41:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:22,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:41:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:41:22,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:41:22,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:41:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:41:22,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:23,014 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 03:41:23,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:41:23,081 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 03:41:23,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:41:23,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855564207] [2021-11-23 03:41:23,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855564207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:23,083 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:23,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 03:41:23,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806134177] [2021-11-23 03:41:23,089 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:23,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:41:23,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:41:23,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:41:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:41:23,154 INFO L87 Difference]: Start difference. First operand has 671 states, 360 states have (on average 1.8166666666666667) internal successors, (654), 571 states have internal predecessors, (654), 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 03:41:25,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:27,211 WARN L534 Checker$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 03:41:29,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:31,236 WARN L534 Checker$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 03:41:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:36,174 INFO L93 Difference]: Finished difference Result 1213 states and 1452 transitions. [2021-11-23 03:41:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:41:36,176 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 03:41:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:36,202 INFO L225 Difference]: With dead ends: 1213 [2021-11-23 03:41:36,202 INFO L226 Difference]: Without dead ends: 1209 [2021-11-23 03:41:36,203 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 03:41:36,207 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 695 mSDsluCounter, 3463 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:36,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 4226 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2033 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2021-11-23 03:41:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-23 03:41:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 994. [2021-11-23 03:41:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 601 states have (on average 1.795341098169717) internal successors, (1079), 821 states have internal predecessors, (1079), 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 03:41:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1355 transitions. [2021-11-23 03:41:36,334 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1355 transitions. Word has length 5 [2021-11-23 03:41:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:36,335 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1355 transitions. [2021-11-23 03:41:36,335 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 03:41:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1355 transitions. [2021-11-23 03:41:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:41:36,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:36,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:41:36,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:36,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:41:36,550 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 202 more)] === [2021-11-23 03:41:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash 346313651, now seen corresponding path program 1 times [2021-11-23 03:41:36,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:41:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659387310] [2021-11-23 03:41:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:36,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:41:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:41:36,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:41:36,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:41:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:36,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:41:36,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:37,051 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 03:41:37,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:41:37,273 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 03:41:37,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:41:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659387310] [2021-11-23 03:41:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659387310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:37,274 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:37,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 03:41:37,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583609758] [2021-11-23 03:41:37,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:37,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:41:37,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:41:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:41:37,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:41:37,277 INFO L87 Difference]: Start difference. First operand 994 states and 1355 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 03:41:39,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:41,313 WARN L534 Checker$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 03:41:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:48,201 INFO L93 Difference]: Finished difference Result 1361 states and 1705 transitions. [2021-11-23 03:41:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:41:48,203 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 03:41:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:48,214 INFO L225 Difference]: With dead ends: 1361 [2021-11-23 03:41:48,215 INFO L226 Difference]: Without dead ends: 1361 [2021-11-23 03:41:48,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:41:48,217 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 603 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 3277 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:48,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 3277 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1291 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 03:41:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-23 03:41:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1223. [2021-11-23 03:41:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 754 states have (on average 1.746684350132626) internal successors, (1317), 976 states have internal predecessors, (1317), 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 03:41:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1685 transitions. [2021-11-23 03:41:48,276 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1685 transitions. Word has length 5 [2021-11-23 03:41:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:48,276 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 1685 transitions. [2021-11-23 03:41:48,277 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 03:41:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1685 transitions. [2021-11-23 03:41:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:41:48,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:48,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:48,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:48,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:41:48,492 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 202 more)] === [2021-11-23 03:41:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119090, now seen corresponding path program 1 times [2021-11-23 03:41:48,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:41:48,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679661974] [2021-11-23 03:41:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:48,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:41:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:41:48,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:41:48,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:41:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:48,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:41:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:48,860 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 03:41:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:41:48,899 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 03:41:48,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:41:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679661974] [2021-11-23 03:41:48,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679661974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:48,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:48,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 2] imperfect sequences [] total 3 [2021-11-23 03:41:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931536616] [2021-11-23 03:41:48,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:48,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:41:48,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:41:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:41:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:41:48,903 INFO L87 Difference]: Start difference. First operand 1223 states and 1685 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 03:41:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:51,874 INFO L93 Difference]: Finished difference Result 2071 states and 2575 transitions. [2021-11-23 03:41:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:41:51,875 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 03:41:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:51,889 INFO L225 Difference]: With dead ends: 2071 [2021-11-23 03:41:51,889 INFO L226 Difference]: Without dead ends: 2071 [2021-11-23 03:41:51,889 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 03:41:51,891 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 1296 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:51,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 2268 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 03:41:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-11-23 03:41:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1637. [2021-11-23 03:41:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1055 states have (on average 1.743127962085308) internal successors, (1839), 1286 states have internal predecessors, (1839), 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 03:41:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2373 transitions. [2021-11-23 03:41:51,960 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2373 transitions. Word has length 11 [2021-11-23 03:41:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:51,960 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 2373 transitions. [2021-11-23 03:41:51,961 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 03:41:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2373 transitions. [2021-11-23 03:41:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:41:51,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:51,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:51,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:52,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:41:52,176 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 202 more)] === [2021-11-23 03:41:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:52,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1264119091, now seen corresponding path program 1 times [2021-11-23 03:41:52,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:41:52,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655239022] [2021-11-23 03:41:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:52,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:41:52,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:41:52,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:41:52,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:41:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:41:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:52,695 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 03:41:52,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:41:52,912 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 03:41:52,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:41:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655239022] [2021-11-23 03:41:52,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655239022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:52,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:52,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 5 [2021-11-23 03:41:52,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356499233] [2021-11-23 03:41:52,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:52,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:41:52,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:41:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:41:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:41:52,914 INFO L87 Difference]: Start difference. First operand 1637 states and 2373 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 03:41:54,934 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 03:42:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:01,361 INFO L93 Difference]: Finished difference Result 1913 states and 2565 transitions. [2021-11-23 03:42:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:42:01,362 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 03:42:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:01,375 INFO L225 Difference]: With dead ends: 1913 [2021-11-23 03:42:01,375 INFO L226 Difference]: Without dead ends: 1913 [2021-11-23 03:42:01,375 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 03:42:01,376 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 859 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:01,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 2787 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1128 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-23 03:42:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-11-23 03:42:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1643. [2021-11-23 03:42:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1061 states have (on average 1.7398680490103675) internal successors, (1846), 1292 states have internal predecessors, (1846), 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 03:42:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2380 transitions. [2021-11-23 03:42:01,434 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2380 transitions. Word has length 11 [2021-11-23 03:42:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:01,435 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2380 transitions. [2021-11-23 03:42:01,435 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 03:42:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2380 transitions. [2021-11-23 03:42:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:42:01,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:01,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:01,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:01,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:42:01,658 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 202 more)] === [2021-11-23 03:42:01,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash -542669447, now seen corresponding path program 1 times [2021-11-23 03:42:01,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:42:01,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205344851] [2021-11-23 03:42:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:01,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:42:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:42:01,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:42:01,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:42:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:42:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:02,004 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 03:42:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:02,063 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 03:42:02,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:42:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205344851] [2021-11-23 03:42:02,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205344851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:02,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735270624] [2021-11-23 03:42:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:02,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:42:02,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:42:02,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:42:02,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 03:42:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:42:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:02,633 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 03:42:02,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:02,671 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 03:42:02,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [735270624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:02,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279479146] [2021-11-23 03:42:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:02,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:02,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:02,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:02,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:42:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:42:02,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:03,042 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 03:42:03,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:03,104 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 03:42:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279479146] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:03,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:42:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 2] imperfect sequences [4, 4, 4, 4] total 8 [2021-11-23 03:42:03,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363954577] [2021-11-23 03:42:03,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:42:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:42:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:42:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:42:03,106 INFO L87 Difference]: Start difference. First operand 1643 states and 2380 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 03:42:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:05,677 INFO L93 Difference]: Finished difference Result 2847 states and 3837 transitions. [2021-11-23 03:42:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:42:05,678 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 03:42:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:05,696 INFO L225 Difference]: With dead ends: 2847 [2021-11-23 03:42:05,696 INFO L226 Difference]: Without dead ends: 2847 [2021-11-23 03:42:05,696 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 03:42:05,697 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1276 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:05,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1276 Valid, 2232 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 03:42:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-11-23 03:42:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2431. [2021-11-23 03:42:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 1623 states have (on average 1.7085643869377696) internal successors, (2773), 1872 states have internal predecessors, (2773), 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 03:42:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3635 transitions. [2021-11-23 03:42:05,781 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3635 transitions. Word has length 16 [2021-11-23 03:42:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:05,781 INFO L470 AbstractCegarLoop]: Abstraction has 2431 states and 3635 transitions. [2021-11-23 03:42:05,781 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 03:42:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3635 transitions. [2021-11-23 03:42:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:42:05,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:05,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:05,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:05,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:06,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:06,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:06,394 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 202 more)] === [2021-11-23 03:42:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash -542669446, now seen corresponding path program 1 times [2021-11-23 03:42:06,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:42:06,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852238345] [2021-11-23 03:42:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:06,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:42:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:42:06,396 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:42:06,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:42:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:42:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:06,749 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 03:42:06,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:06,801 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 03:42:06,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:42:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852238345] [2021-11-23 03:42:06,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852238345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:06,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659529624] [2021-11-23 03:42:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:06,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:42:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:42:06,803 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:42:06,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:42:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:42:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:07,383 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 03:42:07,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:07,418 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 03:42:07,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659529624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116713402] [2021-11-23 03:42:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:07,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:07,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:07,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:07,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:42:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:42:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:07,827 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 03:42:07,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:08,145 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 03:42:08,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116713402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:08,146 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-23 03:42:08,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [4, 4, 4, 4] total 10 [2021-11-23 03:42:08,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837993523] [2021-11-23 03:42:08,146 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:08,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:42:08,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:42:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:42:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:42:08,147 INFO L87 Difference]: Start difference. First operand 2431 states and 3635 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 03:42:10,168 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 03:42:12,180 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 03:42:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:18,097 INFO L93 Difference]: Finished difference Result 2562 states and 3668 transitions. [2021-11-23 03:42:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:42:18,099 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 03:42:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:18,114 INFO L225 Difference]: With dead ends: 2562 [2021-11-23 03:42:18,114 INFO L226 Difference]: Without dead ends: 2562 [2021-11-23 03:42:18,114 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 03:42:18,115 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 565 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 3202 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 3202 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1324 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 03:42:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-11-23 03:42:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2433. [2021-11-23 03:42:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1625 states have (on average 1.7076923076923076) internal successors, (2775), 1874 states have internal predecessors, (2775), 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 03:42:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3637 transitions. [2021-11-23 03:42:18,194 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3637 transitions. Word has length 16 [2021-11-23 03:42:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:18,194 INFO L470 AbstractCegarLoop]: Abstraction has 2433 states and 3637 transitions. [2021-11-23 03:42:18,195 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 03:42:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3637 transitions. [2021-11-23 03:42:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:42:18,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:18,196 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:18,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:18,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:18,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:18,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:18,810 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 202 more)] === [2021-11-23 03:42:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 358713267, now seen corresponding path program 1 times [2021-11-23 03:42:18,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:42:18,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178206154] [2021-11-23 03:42:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:18,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:42:18,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:42:18,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:42:18,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 03:42:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:42:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:19,383 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 03:42:19,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:20,025 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 03:42:20,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:42:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178206154] [2021-11-23 03:42:20,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178206154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [225711637] [2021-11-23 03:42:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:20,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:42:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:42:20,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:42:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 03:42:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:42:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:20,824 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 03:42:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:21,073 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 03:42:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [225711637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500765492] [2021-11-23 03:42:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:21,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:21,076 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:21,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:42:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:42:21,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:21,493 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 03:42:21,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:21,759 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 03:42:21,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500765492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:21,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:42:21,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 9 [2021-11-23 03:42:21,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704975877] [2021-11-23 03:42:21,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:42:21,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:42:21,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:42:21,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:42:21,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:42:21,761 INFO L87 Difference]: Start difference. First operand 2433 states and 3637 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 03:42:23,780 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 03:42:25,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:27,801 WARN L534 Checker$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 03:42:29,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:39,540 INFO L93 Difference]: Finished difference Result 3046 states and 4389 transitions. [2021-11-23 03:42:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:42:39,541 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 03:42:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:39,557 INFO L225 Difference]: With dead ends: 3046 [2021-11-23 03:42:39,557 INFO L226 Difference]: Without dead ends: 3046 [2021-11-23 03:42:39,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:42:39,558 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 1097 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 166 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:39,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 3456 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1696 Invalid, 3 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 03:42:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-11-23 03:42:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2545. [2021-11-23 03:42:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 1700 states have (on average 1.6947058823529413) internal successors, (2881), 1951 states have internal predecessors, (2881), 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 03:42:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3793 transitions. [2021-11-23 03:42:39,639 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3793 transitions. Word has length 17 [2021-11-23 03:42:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:39,640 INFO L470 AbstractCegarLoop]: Abstraction has 2545 states and 3793 transitions. [2021-11-23 03:42:39,640 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 03:42:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3793 transitions. [2021-11-23 03:42:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:42:39,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:39,642 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:42:39,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:39,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-23 03:42:40,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:40,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:40,264 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 202 more)] === [2021-11-23 03:42:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1033968819, now seen corresponding path program 2 times [2021-11-23 03:42:40,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:42:40,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368744071] [2021-11-23 03:42:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:42:40,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:42:40,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:42:40,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:42:40,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 03:42:40,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:42:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:42:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:42:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:41,208 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 03:42:41,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:43,165 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 03:42:43,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:42:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368744071] [2021-11-23 03:42:43,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368744071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399965755] [2021-11-23 03:42:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:42:43,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:42:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:42:43,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:42:43,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 03:42:44,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:42:44,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:42:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:42:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:42:44,539 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 03:42:44,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:46,493 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 03:42:46,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [399965755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12571436] [2021-11-23 03:42:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 03:42:46,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:42:46,508 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:42:46,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 03:42:59,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 03:42:59,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:42:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:42:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:43:00,105 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 03:43:00,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:43:02,623 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 03:43:02,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12571436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:43:02,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:43:02,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8, 9, 8, 10] total 30 [2021-11-23 03:43:02,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189609467] [2021-11-23 03:43:02,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:43:02,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 03:43:02,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:43:02,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 03:43:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:43:02,626 INFO L87 Difference]: Start difference. First operand 2545 states and 3793 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 03:43:04,644 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 03:43:06,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:08,666 WARN L534 Checker$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 03:43:10,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:12,685 WARN L534 Checker$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 03:44:15,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:15,905 INFO L93 Difference]: Finished difference Result 3552 states and 4938 transitions. [2021-11-23 03:44:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 03:44:15,906 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 03:44:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:15,925 INFO L225 Difference]: With dead ends: 3552 [2021-11-23 03:44:15,925 INFO L226 Difference]: Without dead ends: 3552 [2021-11-23 03:44:15,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=611, Invalid=1839, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:44:15,927 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 4053 mSDsluCounter, 11203 mSDsCounter, 0 mSdLazyCounter, 9530 mSolverCounterSat, 500 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4065 SdHoareTripleChecker+Valid, 11946 SdHoareTripleChecker+Invalid, 10035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 9530 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:15,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4065 Valid, 11946 Invalid, 10035 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [500 Valid, 9530 Invalid, 5 Unknown, 0 Unchecked, 62.2s Time] [2021-11-23 03:44:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-11-23 03:44:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2607. [2021-11-23 03:44:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 1762 states have (on average 1.6935300794551646) internal successors, (2984), 2008 states have internal predecessors, (2984), 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 03:44:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3896 transitions. [2021-11-23 03:44:16,018 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3896 transitions. Word has length 29 [2021-11-23 03:44:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:16,019 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 3896 transitions. [2021-11-23 03:44:16,019 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 03:44:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3896 transitions. [2021-11-23 03:44:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 03:44:16,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:16,023 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:16,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:16,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:16,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:16,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:16,629 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting zf_readwErr0ASSERT_VIOLATIONMEMORY_LEAK === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-11-23 03:44:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash 423791340, now seen corresponding path program 1 times [2021-11-23 03:44:16,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:44:16,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582353507] [2021-11-23 03:44:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:16,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:44:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:44:16,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:44:16,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 03:44:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:44:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:17,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:17,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:44:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582353507] [2021-11-23 03:44:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582353507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:17,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2134392168] [2021-11-23 03:44:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:17,458 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:44:17,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:44:17,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:44:17,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 03:44:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:44:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:18,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2134392168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067016207] [2021-11-23 03:44:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:18,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:18,255 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:18,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 03:44:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:18,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:44:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:18,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:44:19,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067016207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:19,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:44:19,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 11] total 25 [2021-11-23 03:44:19,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902563693] [2021-11-23 03:44:19,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:19,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:44:19,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:44:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:44:19,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-23 03:44:19,190 INFO L87 Difference]: Start difference. First operand 2607 states and 3896 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:44:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:20,879 INFO L93 Difference]: Finished difference Result 2613 states and 3896 transitions. [2021-11-23 03:44:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:44:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2021-11-23 03:44:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:20,896 INFO L225 Difference]: With dead ends: 2613 [2021-11-23 03:44:20,896 INFO L226 Difference]: Without dead ends: 2613 [2021-11-23 03:44:20,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 03:44:20,898 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 896 mSDsluCounter, 6522 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 7299 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:20,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 7299 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:44:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-11-23 03:44:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2612. [2021-11-23 03:44:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 1767 states have (on average 1.688737973967176) internal successors, (2984), 2013 states have internal predecessors, (2984), 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 03:44:20,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 3896 transitions. [2021-11-23 03:44:20,976 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 3896 transitions. Word has length 53 [2021-11-23 03:44:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 2612 states and 3896 transitions. [2021-11-23 03:44:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 03:44:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 3896 transitions. [2021-11-23 03:44:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 03:44:20,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:20,978 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:21,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:21,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:21,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:21,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:44:21,602 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [spin_lock_initErr0REQUIRES_VIOLATION, spin_lock_initErr1REQUIRES_VIOLATION, spin_lock_initErr2REQUIRES_VIOLATION, spin_lock_initErr3REQUIRES_VIOLATION (and 202 more)] === [2021-11-23 03:44:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2050606771, now seen corresponding path program 3 times [2021-11-23 03:44:21,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:44:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123679526] [2021-11-23 03:44:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:44:21,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:44:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:44:21,605 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:44:21,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 03:44:22,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 03:44:22,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:44:22,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:44:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:22,929 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 03:44:22,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:23,476 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 03:44:23,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:44:23,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123679526] [2021-11-23 03:44:23,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123679526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:23,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635242786] [2021-11-23 03:44:23,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:44:23,477 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:44:23,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:44:23,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:44:23,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 03:44:26,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 03:44:26,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:44:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 03:44:26,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:27,513 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 03:44:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:49,437 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 03:44:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635242786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969073663] [2021-11-23 03:44:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:44:49,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:49,439 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46921938-ce24-40e8-b634-f64ac9342a79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 03:53:25,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 03:53:25,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:53:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:53:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 128 proven. 155 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 03:53:26,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:45,611 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 03:53:45,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969073663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:45,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:53:45,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 26, 13, 19] total 79 [2021-11-23 03:53:45,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387200877] [2021-11-23 03:53:45,612 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:45,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 03:53:45,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:53:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 03:53:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=5130, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 03:53:45,616 INFO L87 Difference]: Start difference. First operand 2612 states and 3896 transitions. Second operand has 79 states, 79 states have (on average 2.632911392405063) internal successors, (208), 79 states have internal predecessors, (208), 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 03:53:47,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:49,648 WARN L534 Checker$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 03:53:51,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:53,673 WARN L534 Checker$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 03:54:19,049 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 117 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:25,860 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 124 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:08,039 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 130 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)