./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:42,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:42,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:42,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:42,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:42,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:42,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:42,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:42,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:42,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:42,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:42,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:42,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:42,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:42,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:42,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:42,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:42,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:42,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:42,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:42,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:42,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:42,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:42,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:42,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:42,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:42,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:42,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:42,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:42,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:42,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:42,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:42,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:42,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:42,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:42,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:42,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:42,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:42,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:42,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:42,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:42,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:15:42,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:42,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:42,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:42,946 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:42,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:42,946 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:42,947 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:15:42,947 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:42,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:42,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:15:42,955 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:15:42,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:42,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:15:42,956 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:15:42,956 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:15:42,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:42,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:15:42,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:42,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:42,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:42,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:42,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:42,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:42,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:42,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:42,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:42,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:42,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:42,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:42,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:42,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:42,962 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:15:42,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:15:42,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:42,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:42,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:42,963 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2021-11-07 02:15:43,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:43,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:43,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:43,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:43,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:43,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 02:15:43,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/0e8c71b7b/b0492d74090b45ad8b71f987647d339b/FLAG1c0e2ede1 [2021-11-07 02:15:44,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:44,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 02:15:44,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/0e8c71b7b/b0492d74090b45ad8b71f987647d339b/FLAG1c0e2ede1 [2021-11-07 02:15:44,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/0e8c71b7b/b0492d74090b45ad8b71f987647d339b [2021-11-07 02:15:44,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:44,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:44,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:44,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:44,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:44,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:44" (1/1) ... [2021-11-07 02:15:44,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f516f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:44, skipping insertion in model container [2021-11-07 02:15:44,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:44" (1/1) ... [2021-11-07 02:15:44,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:44,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:45,749 WARN L228 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 02:15:46,081 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,090 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,121 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,122 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,158 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,163 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,172 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,179 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,194 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,200 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,238 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,244 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,257 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,271 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,276 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,288 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,294 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,300 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,346 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,363 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,377 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,414 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,414 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,415 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,426 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,446 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,446 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,447 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,447 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,521 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:15:46,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:46,588 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) [2021-11-07 02:15:46,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@703d2aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:46, skipping insertion in model container [2021-11-07 02:15:46,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:46,589 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:15:46,592 INFO L168 Benchmark]: Toolchain (without parser) took 1901.64 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 60.0 MB in the beginning and 100.5 MB in the end (delta: -40.5 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:46,592 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:15:46,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1898.77 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 59.8 MB in the beginning and 100.5 MB in the end (delta: -40.8 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:46,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 54.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1898.77 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 59.8 MB in the beginning and 100.5 MB in the end (delta: -40.8 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5829]: 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:48,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:48,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:48,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:48,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:48,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:48,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:48,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:48,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:48,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:48,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:48,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:48,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:48,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:48,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:48,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:48,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:48,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:48,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:48,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:49,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:49,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:49,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:49,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:49,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:49,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:49,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:49,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:49,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:49,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:49,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:49,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:49,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:49,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:49,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:49,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:49,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:49,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:49,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:49,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:49,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:49,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:15:49,081 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:49,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:49,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:49,083 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:49,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:49,083 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:49,084 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:49,084 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:49,084 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:49,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:49,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:49,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:49,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:49,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:49,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:49,088 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:15:49,088 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:15:49,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:49,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:49,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:49,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:49,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:15:49,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:49,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:49,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:49,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:49,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:49,091 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:15:49,091 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:49,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:49,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:49,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:49,092 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2021-11-07 02:15:49,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:49,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:49,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:49,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:49,466 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:49,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 02:15:49,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/b301a6993/274ab5956fc94998abf3a257e9796a0d/FLAGb1224f8ac [2021-11-07 02:15:50,408 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:50,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 02:15:50,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/b301a6993/274ab5956fc94998abf3a257e9796a0d/FLAGb1224f8ac [2021-11-07 02:15:50,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/data/b301a6993/274ab5956fc94998abf3a257e9796a0d [2021-11-07 02:15:50,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:50,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:50,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:50,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:50,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:50,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:50" (1/1) ... [2021-11-07 02:15:50,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1307fa44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:50, skipping insertion in model container [2021-11-07 02:15:50,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:50" (1/1) ... [2021-11-07 02:15:50,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:51,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:52,020 WARN L228 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 02:15:52,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:52,869 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:15:52,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:53,059 WARN L228 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 02:15:53,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:53,219 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:15:53,366 WARN L228 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_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 02:15:53,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:53,608 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:15:53,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53 WrapperNode [2021-11-07 02:15:53,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:53,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:53,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:15:53,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:15:53,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:53,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:53,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:53,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:15:53,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:15:53,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:15:53,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:53,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:53,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:53,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:54,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:54,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:54,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:54,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:15:54,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:15:54,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:15:54,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:15:54,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (1/1) ... [2021-11-07 02:15:54,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:54,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:54,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:15:54,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:15:54,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:15:54,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:15:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:15:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:15:54,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:15:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:16:43,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:16:43,444 INFO L299 CfgBuilder]: Removed 1046 assume(true) statements. [2021-11-07 02:16:43,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:43 BoogieIcfgContainer [2021-11-07 02:16:43,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:16:43,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:16:43,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:16:43,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:16:43,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:15:50" (1/3) ... [2021-11-07 02:16:43,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bef4b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:43, skipping insertion in model container [2021-11-07 02:16:43,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:53" (2/3) ... [2021-11-07 02:16:43,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bef4b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:43, skipping insertion in model container [2021-11-07 02:16:43,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:43" (3/3) ... [2021-11-07 02:16:43,457 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 02:16:43,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:16:43,463 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:16:43,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:16:43,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:16:43,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:16:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:16:43,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:43,569 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:43,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1648518912, now seen corresponding path program 1 times [2021-11-07 02:16:43,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:43,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685362054] [2021-11-07 02:16:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:43,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:43,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:16:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:16:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:44,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:45,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:45,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685362054] [2021-11-07 02:16:45,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685362054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:45,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:45,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:45,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466573202] [2021-11-07 02:16:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:45,158 INFO L87 Difference]: Start difference. First operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:45,341 INFO L93 Difference]: Finished difference Result 1825 states and 2519 transitions. [2021-11-07 02:16:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:16:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:45,373 INFO L225 Difference]: With dead ends: 1825 [2021-11-07 02:16:45,374 INFO L226 Difference]: Without dead ends: 907 [2021-11-07 02:16:45,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-11-07 02:16:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2021-11-07 02:16:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.32560706401766) internal successors, (1201), 906 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1201 transitions. [2021-11-07 02:16:45,502 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1201 transitions. Word has length 29 [2021-11-07 02:16:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1201 transitions. [2021-11-07 02:16:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1201 transitions. [2021-11-07 02:16:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:16:45,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:45,506 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:45,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:45,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:45,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1938682080, now seen corresponding path program 1 times [2021-11-07 02:16:45,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:45,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057815502] [2021-11-07 02:16:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:45,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:45,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:45,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:16:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:16:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:47,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:47,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:47,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057815502] [2021-11-07 02:16:47,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057815502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:47,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163946270] [2021-11-07 02:16:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:47,472 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:47,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:47,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:47,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 02:16:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:48,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:48,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:48,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163946270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:48,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:16:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:16:48,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994897760] [2021-11-07 02:16:48,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:48,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:16:48,768 INFO L87 Difference]: Start difference. First operand 907 states and 1201 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:51,143 INFO L93 Difference]: Finished difference Result 3472 states and 4622 transitions. [2021-11-07 02:16:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 02:16:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:51,160 INFO L225 Difference]: With dead ends: 3472 [2021-11-07 02:16:51,161 INFO L226 Difference]: Without dead ends: 2602 [2021-11-07 02:16:51,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:16:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-11-07 02:16:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2602. [2021-11-07 02:16:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2602 states, 2601 states have (on average 1.3306420607458669) internal successors, (3461), 2601 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 3461 transitions. [2021-11-07 02:16:51,296 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 3461 transitions. Word has length 31 [2021-11-07 02:16:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:51,298 INFO L470 AbstractCegarLoop]: Abstraction has 2602 states and 3461 transitions. [2021-11-07 02:16:51,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 3461 transitions. [2021-11-07 02:16:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:16:51,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:51,308 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:51,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:51,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:51,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1437400957, now seen corresponding path program 1 times [2021-11-07 02:16:51,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:51,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132632117] [2021-11-07 02:16:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:51,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:51,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:51,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:16:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:16:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:53,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:53,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:53,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132632117] [2021-11-07 02:16:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132632117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:53,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730189618] [2021-11-07 02:16:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:53,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:53,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:53,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 02:16:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:54,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730189618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:54,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:16:54,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:16:54,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376852158] [2021-11-07 02:16:54,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:54,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:16:54,945 INFO L87 Difference]: Start difference. First operand 2602 states and 3461 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:55,811 INFO L93 Difference]: Finished difference Result 7730 states and 10294 transitions. [2021-11-07 02:16:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:16:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:55,844 INFO L225 Difference]: With dead ends: 7730 [2021-11-07 02:16:55,844 INFO L226 Difference]: Without dead ends: 5160 [2021-11-07 02:16:55,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:16:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-11-07 02:16:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 5088. [2021-11-07 02:16:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 1.332022803223904) internal successors, (6776), 5087 states have internal predecessors, (6776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 6776 transitions. [2021-11-07 02:16:56,086 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 6776 transitions. Word has length 38 [2021-11-07 02:16:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:56,087 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 6776 transitions. [2021-11-07 02:16:56,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:56,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 6776 transitions. [2021-11-07 02:16:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:16:56,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:56,100 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:56,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:56,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:56,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash 867100728, now seen corresponding path program 1 times [2021-11-07 02:16:56,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:56,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221838579] [2021-11-07 02:16:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:56,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:56,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:56,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:56,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:16:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:16:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:16:58,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:16:58,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:58,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221838579] [2021-11-07 02:16:58,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221838579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:58,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [938493530] [2021-11-07 02:16:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:58,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:58,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:58,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 02:16:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:59,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:59,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:00,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [938493530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:00,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:00,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:17:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813933410] [2021-11-07 02:17:00,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:00,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:17:00,144 INFO L87 Difference]: Start difference. First operand 5088 states and 6776 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:00,800 INFO L93 Difference]: Finished difference Result 13195 states and 17562 transitions. [2021-11-07 02:17:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:17:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:00,854 INFO L225 Difference]: With dead ends: 13195 [2021-11-07 02:17:00,854 INFO L226 Difference]: Without dead ends: 8144 [2021-11-07 02:17:00,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:17:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-11-07 02:17:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 7626. [2021-11-07 02:17:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 7625 states have (on average 1.3299672131147542) internal successors, (10141), 7625 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 10141 transitions. [2021-11-07 02:17:01,220 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 10141 transitions. Word has length 76 [2021-11-07 02:17:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 7626 states and 10141 transitions. [2021-11-07 02:17:01,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 10141 transitions. [2021-11-07 02:17:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:17:01,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:01,235 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:01,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:01,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:01,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:01,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -697354416, now seen corresponding path program 1 times [2021-11-07 02:17:01,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:01,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766217176] [2021-11-07 02:17:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:01,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:01,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:01,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:17:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:03,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766217176] [2021-11-07 02:17:03,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766217176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:03,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [534478316] [2021-11-07 02:17:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:03,866 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:03,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:03,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:17:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:05,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [534478316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:05,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:05,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:17:05,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790050292] [2021-11-07 02:17:05,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:05,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:17:05,290 INFO L87 Difference]: Start difference. First operand 7626 states and 10141 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:05,894 INFO L93 Difference]: Finished difference Result 19045 states and 25318 transitions. [2021-11-07 02:17:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 02:17:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:05,974 INFO L225 Difference]: With dead ends: 19045 [2021-11-07 02:17:05,974 INFO L226 Difference]: Without dead ends: 14957 [2021-11-07 02:17:05,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:17:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-11-07 02:17:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 7662. [2021-11-07 02:17:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7662 states, 7661 states have (on average 1.3284166557890615) internal successors, (10177), 7661 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7662 states to 7662 states and 10177 transitions. [2021-11-07 02:17:06,435 INFO L78 Accepts]: Start accepts. Automaton has 7662 states and 10177 transitions. Word has length 86 [2021-11-07 02:17:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:06,437 INFO L470 AbstractCegarLoop]: Abstraction has 7662 states and 10177 transitions. [2021-11-07 02:17:06,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7662 states and 10177 transitions. [2021-11-07 02:17:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:17:06,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:06,450 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:06,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:06,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:17:06,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:06,861 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1269648977, now seen corresponding path program 1 times [2021-11-07 02:17:06,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:06,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516326447] [2021-11-07 02:17:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:06,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:06,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:06,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:06,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:17:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:08,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:09,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:09,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516326447] [2021-11-07 02:17:09,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516326447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:09,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [158716959] [2021-11-07 02:17:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:09,062 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:09,062 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:09,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:17:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:10,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [158716959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:10,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:17:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564631223] [2021-11-07 02:17:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:17:10,803 INFO L87 Difference]: Start difference. First operand 7662 states and 10177 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:13,790 INFO L93 Difference]: Finished difference Result 21550 states and 28702 transitions. [2021-11-07 02:17:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 02:17:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:13,825 INFO L225 Difference]: With dead ends: 21550 [2021-11-07 02:17:13,826 INFO L226 Difference]: Without dead ends: 13925 [2021-11-07 02:17:13,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:17:13,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13925 states. [2021-11-07 02:17:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13925 to 13910. [2021-11-07 02:17:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13910 states, 13909 states have (on average 1.3297145732978648) internal successors, (18495), 13909 states have internal predecessors, (18495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 18495 transitions. [2021-11-07 02:17:14,604 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 18495 transitions. Word has length 88 [2021-11-07 02:17:14,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:14,605 INFO L470 AbstractCegarLoop]: Abstraction has 13910 states and 18495 transitions. [2021-11-07 02:17:14,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 18495 transitions. [2021-11-07 02:17:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:17:14,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:14,630 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:14,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:14,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:15,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:15,044 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1542800466, now seen corresponding path program 1 times [2021-11-07 02:17:15,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:15,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16809786] [2021-11-07 02:17:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:15,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:15,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:15,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:17:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:16,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:17:16,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:17:17,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:17,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16809786] [2021-11-07 02:17:17,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16809786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:17,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522673765] [2021-11-07 02:17:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:17,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:17,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:17:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:17:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:17:18,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 02:17:19,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [522673765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:19,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:19,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:17:19,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075422991] [2021-11-07 02:17:19,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:19,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:17:19,300 INFO L87 Difference]: Start difference. First operand 13910 states and 18495 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:22,757 INFO L93 Difference]: Finished difference Result 38796 states and 51469 transitions. [2021-11-07 02:17:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:17:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 02:17:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:22,823 INFO L225 Difference]: With dead ends: 38796 [2021-11-07 02:17:22,823 INFO L226 Difference]: Without dead ends: 24923 [2021-11-07 02:17:22,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:17:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-11-07 02:17:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 13922. [2021-11-07 02:17:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13922 states, 13921 states have (on average 1.3294303570145822) internal successors, (18507), 13921 states have internal predecessors, (18507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13922 states to 13922 states and 18507 transitions. [2021-11-07 02:17:23,845 INFO L78 Accepts]: Start accepts. Automaton has 13922 states and 18507 transitions. Word has length 100 [2021-11-07 02:17:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:23,846 INFO L470 AbstractCegarLoop]: Abstraction has 13922 states and 18507 transitions. [2021-11-07 02:17:23,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13922 states and 18507 transitions. [2021-11-07 02:17:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:17:23,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:23,859 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:23,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:24,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-07 02:17:24,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:24,284 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -726011073, now seen corresponding path program 1 times [2021-11-07 02:17:24,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:24,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301751240] [2021-11-07 02:17:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:24,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:24,287 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:24,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:17:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:26,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:27,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:27,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301751240] [2021-11-07 02:17:27,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301751240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:27,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [720540016] [2021-11-07 02:17:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:27,010 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:27,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:27,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:27,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:17:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:28,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:17:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:28,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:29,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [720540016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:29,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:29,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:17:29,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491610458] [2021-11-07 02:17:29,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:29,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:17:29,052 INFO L87 Difference]: Start difference. First operand 13922 states and 18507 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:32,363 INFO L93 Difference]: Finished difference Result 37524 states and 49807 transitions. [2021-11-07 02:17:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:17:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 02:17:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:32,416 INFO L225 Difference]: With dead ends: 37524 [2021-11-07 02:17:32,416 INFO L226 Difference]: Without dead ends: 23639 [2021-11-07 02:17:32,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:17:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23639 states. [2021-11-07 02:17:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23639 to 13934. [2021-11-07 02:17:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13934 states, 13933 states have (on average 1.3291466303021604) internal successors, (18519), 13933 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13934 states to 13934 states and 18519 transitions. [2021-11-07 02:17:33,189 INFO L78 Accepts]: Start accepts. Automaton has 13934 states and 18519 transitions. Word has length 116 [2021-11-07 02:17:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:33,189 INFO L470 AbstractCegarLoop]: Abstraction has 13934 states and 18519 transitions. [2021-11-07 02:17:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13934 states and 18519 transitions. [2021-11-07 02:17:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 02:17:33,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:33,202 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:33,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:33,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:33,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:33,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -53863657, now seen corresponding path program 1 times [2021-11-07 02:17:33,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:33,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57628672] [2021-11-07 02:17:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:33,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:33,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:33,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:33,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:17:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:35,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:35,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:36,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:36,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57628672] [2021-11-07 02:17:36,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57628672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:36,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171631973] [2021-11-07 02:17:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:36,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:36,419 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:36,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:17:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:17:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:39,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171631973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:39,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:17:39,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 02:17:39,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251481423] [2021-11-07 02:17:39,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:17:39,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:39,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:17:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:17:39,291 INFO L87 Difference]: Start difference. First operand 13934 states and 18519 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:49,827 INFO L93 Difference]: Finished difference Result 53706 states and 71327 transitions. [2021-11-07 02:17:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:17:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 02:17:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:49,916 INFO L225 Difference]: With dead ends: 53706 [2021-11-07 02:17:49,916 INFO L226 Difference]: Without dead ends: 39809 [2021-11-07 02:17:49,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:17:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39809 states. [2021-11-07 02:17:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39809 to 13952. [2021-11-07 02:17:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13952 states, 13951 states have (on average 1.3287219554153824) internal successors, (18537), 13951 states have internal predecessors, (18537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13952 states to 13952 states and 18537 transitions. [2021-11-07 02:17:50,944 INFO L78 Accepts]: Start accepts. Automaton has 13952 states and 18537 transitions. Word has length 124 [2021-11-07 02:17:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:50,945 INFO L470 AbstractCegarLoop]: Abstraction has 13952 states and 18537 transitions. [2021-11-07 02:17:50,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13952 states and 18537 transitions. [2021-11-07 02:17:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 02:17:50,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:50,955 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:50,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:51,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:51,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:51,366 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash -409788173, now seen corresponding path program 1 times [2021-11-07 02:17:51,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:51,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884540365] [2021-11-07 02:17:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:51,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:51,369 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:51,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:17:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:17:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:53,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:17:54,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:54,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884540365] [2021-11-07 02:17:54,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884540365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:54,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1503225016] [2021-11-07 02:17:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:54,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:54,341 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:54,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:17:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:56,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:17:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:56,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:57,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1503225016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:57,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023532469] [2021-11-07 02:17:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:57,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:17:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:57,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:17:57,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 02:17:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:17:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:17:59,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:18:00,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023532469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:00,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:18:00,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 02:18:00,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129885326] [2021-11-07 02:18:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:18:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:18:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:18:00,448 INFO L87 Difference]: Start difference. First operand 13952 states and 18537 transitions. Second operand has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:08,364 INFO L93 Difference]: Finished difference Result 97435 states and 129490 transitions. [2021-11-07 02:18:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:18:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 02:18:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:08,656 INFO L225 Difference]: With dead ends: 97435 [2021-11-07 02:18:08,656 INFO L226 Difference]: Without dead ends: 83519 [2021-11-07 02:18:08,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:18:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83519 states. [2021-11-07 02:18:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83519 to 82392. [2021-11-07 02:18:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82392 states, 82391 states have (on average 1.3301938318505662) internal successors, (109596), 82391 states have internal predecessors, (109596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82392 states to 82392 states and 109596 transitions. [2021-11-07 02:18:14,993 INFO L78 Accepts]: Start accepts. Automaton has 82392 states and 109596 transitions. Word has length 126 [2021-11-07 02:18:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:14,993 INFO L470 AbstractCegarLoop]: Abstraction has 82392 states and 109596 transitions. [2021-11-07 02:18:14,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 82392 states and 109596 transitions. [2021-11-07 02:18:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 02:18:15,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:15,036 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:15,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:15,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:15,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 02:18:15,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:15,644 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:18:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1004009003, now seen corresponding path program 1 times [2021-11-07 02:18:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:15,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570622838] [2021-11-07 02:18:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:15,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:15,648 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:15,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02748a24-cd5b-4b8a-b0b2-77d00ecaab99/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:18:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:18:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:18:18,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:18:19,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:19,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570622838] [2021-11-07 02:18:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570622838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:19,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:19,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 02:18:19,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255289843] [2021-11-07 02:18:19,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:18:19,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:18:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:19,118 INFO L87 Difference]: Start difference. First operand 82392 states and 109596 transitions. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)