./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--wan--x25_asy.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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:13,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:13,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:14,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:14,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:14,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:14,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:14,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:14,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:14,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:14,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:14,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:14,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:14,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:14,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:14,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:14,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:14,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:14,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:14,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:14,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:14,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:14,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:14,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:14,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:14,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:14,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:14,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:14,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:14,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:14,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:14,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:14,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:14,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:14,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:14,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:14,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:14,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:14,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:14,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:14,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:14,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:15:14,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:14,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:14,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:14,157 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:14,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:14,158 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:14,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:15:14,158 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:14,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:14,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:15:14,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:15:14,166 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:14,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:15:14,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:15:14,167 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:15:14,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:14,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:15:14,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:14,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:14,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:14,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:14,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:14,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:14,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:14,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:14,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:14,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:14,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:14,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:14,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:14,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:14,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:15:14,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:15:14,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:14,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:14,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:14,175 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-07 02:15:14,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:14,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:14,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:14,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:14,493 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:14,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 02:15:14,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/2745e156d/e56ad5358bcf4aff872af12e44d75d3b/FLAG63b157006 [2021-11-07 02:15:15,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:15,607 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 02:15:15,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/2745e156d/e56ad5358bcf4aff872af12e44d75d3b/FLAG63b157006 [2021-11-07 02:15:15,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/2745e156d/e56ad5358bcf4aff872af12e44d75d3b [2021-11-07 02:15:15,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:15,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:15,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:15,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:15,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:15,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:15" (1/1) ... [2021-11-07 02:15:15,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d28c13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15, skipping insertion in model container [2021-11-07 02:15:15,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:15" (1/1) ... [2021-11-07 02:15:15,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:16,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:17,168 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 02:15:17,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:17,799 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 02:15:17,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5131729e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:17, skipping insertion in model container [2021-11-07 02:15:17,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:17,800 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:15:17,803 INFO L168 Benchmark]: Toolchain (without parser) took 1831.70 ms. Allocated memory is still 94.4 MB. Free memory was 66.0 MB in the beginning and 40.8 MB in the end (delta: 25.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:17,804 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 72.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:15:17,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1828.62 ms. Allocated memory is still 94.4 MB. Free memory was 65.7 MB in the beginning and 40.8 MB in the end (delta: 24.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:15:17,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 94.4 MB. Free memory was 72.7 MB in the beginning and 72.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1828.62 ms. Allocated memory is still 94.4 MB. Free memory was 65.7 MB in the beginning and 40.8 MB in the end (delta: 24.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5704]: 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:15:20,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:15:20,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:15:20,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:15:20,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:15:20,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:15:20,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:15:20,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:15:20,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:15:20,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:15:20,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:15:20,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:15:20,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:15:20,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:15:20,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:15:20,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:15:20,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:15:20,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:15:20,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:15:20,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:15:20,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:15:20,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:15:20,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:15:20,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:15:20,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:15:20,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:15:20,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:15:20,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:15:20,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:15:20,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:15:20,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:15:20,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:15:20,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:15:20,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:15:20,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:15:20,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:15:20,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:15:20,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:15:20,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:15:20,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:15:20,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:15:20,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:15:20,895 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:15:20,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:15:20,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:15:20,897 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:15:20,897 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:15:20,897 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:15:20,897 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:15:20,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:15:20,898 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:15:20,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:15:20,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:15:20,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:15:20,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:15:20,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:15:20,900 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:15:20,900 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:15:20,900 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:15:20,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:15:20,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:15:20,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:15:20,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:15:20,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:15:20,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:15:20,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:20,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:15:20,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:15:20,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:15:20,903 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:15:20,903 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:20,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:15:20,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:15:20,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:15:20,904 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-07 02:15:21,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:15:21,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:15:21,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:15:21,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:15:21,419 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:15:21,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/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--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 02:15:21,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/bbb6b90ee/1399d899e0d540169d87c89299f7ec3a/FLAG3d34f3295 [2021-11-07 02:15:22,633 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:15:22,634 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 02:15:22,673 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/bbb6b90ee/1399d899e0d540169d87c89299f7ec3a/FLAG3d34f3295 [2021-11-07 02:15:23,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/data/bbb6b90ee/1399d899e0d540169d87c89299f7ec3a [2021-11-07 02:15:23,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:15:23,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:15:23,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:23,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:15:23,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:15:23,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:23" (1/1) ... [2021-11-07 02:15:23,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cf4d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:23, skipping insertion in model container [2021-11-07 02:15:23,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:23" (1/1) ... [2021-11-07 02:15:23,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:15:23,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:24,286 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 02:15:25,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:25,089 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:15:25,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:15:25,351 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 02:15:25,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:25,470 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:15:25,729 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_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-07 02:15:25,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:15:26,151 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:15:26,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26 WrapperNode [2021-11-07 02:15:26,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:15:26,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:26,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:15:26,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:15:26,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:15:26,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:15:26,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:15:26,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:15:26,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:15:26,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:15:26,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:15:26,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:15:26,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (1/1) ... [2021-11-07 02:15:26,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:15:26,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:27,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:15:27,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:15:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:15:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:15:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 02:15:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:15:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:15:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:15:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:15:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:15:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:15:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:15:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:15:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:15:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:15:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:15:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:15:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:15:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:15:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:15:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:15:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:15:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:15:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:15:27,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:15:57,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:15:57,951 INFO L299 CfgBuilder]: Removed 1048 assume(true) statements. [2021-11-07 02:15:57,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:57 BoogieIcfgContainer [2021-11-07 02:15:57,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:15:57,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:15:57,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:15:57,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:15:57,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:15:23" (1/3) ... [2021-11-07 02:15:57,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10977f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:57, skipping insertion in model container [2021-11-07 02:15:57,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:26" (2/3) ... [2021-11-07 02:15:57,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10977f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:57, skipping insertion in model container [2021-11-07 02:15:57,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:57" (3/3) ... [2021-11-07 02:15:57,964 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-07 02:15:57,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:15:57,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:15:58,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:15:58,037 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 02:15:58,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:15:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 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 02:15:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:15:58,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:58,093 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] [2021-11-07 02:15:58,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1191082698, now seen corresponding path program 1 times [2021-11-07 02:15:58,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:58,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437657362] [2021-11-07 02:15:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:58,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:58,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:58,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:58,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:15:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:59,054 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 02:15:59,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:59,234 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 02:15:59,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:59,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437657362] [2021-11-07 02:15:59,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437657362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:59,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:59,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275087204] [2021-11-07 02:15:59,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:59,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:59,273 INFO L87 Difference]: Start difference. First operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 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 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 02:16:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:01,727 INFO L93 Difference]: Finished difference Result 3904 states and 5887 transitions. [2021-11-07 02:16:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 27 [2021-11-07 02:16:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:01,779 INFO L225 Difference]: With dead ends: 3904 [2021-11-07 02:16:01,780 INFO L226 Difference]: Without dead ends: 2871 [2021-11-07 02:16:01,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 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 02:16:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-11-07 02:16:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2871. [2021-11-07 02:16:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 1.3895470383275261) internal successors, (3988), 2870 states have internal predecessors, (3988), 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 02:16:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 3988 transitions. [2021-11-07 02:16:02,119 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 3988 transitions. Word has length 27 [2021-11-07 02:16:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:02,120 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 3988 transitions. [2021-11-07 02:16:02,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 02:16:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 3988 transitions. [2021-11-07 02:16:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:16:02,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:02,126 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, 1, 1, 1, 1] [2021-11-07 02:16:02,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:16:02,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:02,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1908761624, now seen corresponding path program 1 times [2021-11-07 02:16:02,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:02,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482072543] [2021-11-07 02:16:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:02,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:02,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:16:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:03,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:03,527 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 02:16:03,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:03,768 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 02:16:03,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:03,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482072543] [2021-11-07 02:16:03,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482072543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:03,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:03,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:16:03,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988463065] [2021-11-07 02:16:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:03,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:03,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:03,774 INFO L87 Difference]: Start difference. First operand 2871 states and 3988 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 02:16:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:03,970 INFO L93 Difference]: Finished difference Result 5714 states and 7943 transitions. [2021-11-07 02:16:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 33 [2021-11-07 02:16:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:03,991 INFO L225 Difference]: With dead ends: 5714 [2021-11-07 02:16:03,991 INFO L226 Difference]: Without dead ends: 2871 [2021-11-07 02:16:03,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 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 02:16:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-11-07 02:16:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2871. [2021-11-07 02:16:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 1.389198606271777) internal successors, (3987), 2870 states have internal predecessors, (3987), 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 02:16:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 3987 transitions. [2021-11-07 02:16:04,146 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 3987 transitions. Word has length 33 [2021-11-07 02:16:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:04,147 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 3987 transitions. [2021-11-07 02:16:04,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 02:16:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 3987 transitions. [2021-11-07 02:16:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:16:04,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:04,150 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, 1, 1, 1, 1] [2021-11-07 02:16:04,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:04,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:04,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1321955610, now seen corresponding path program 1 times [2021-11-07 02:16:04,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:04,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418742162] [2021-11-07 02:16:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:04,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:04,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:04,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:16:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:16:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:05,510 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 02:16:05,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:06,540 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 02:16:06,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:06,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418742162] [2021-11-07 02:16:06,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418742162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:06,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:06,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:16:06,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410710418] [2021-11-07 02:16:06,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:06,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:06,544 INFO L87 Difference]: Start difference. First operand 2871 states and 3987 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 02:16:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:07,631 INFO L93 Difference]: Finished difference Result 6646 states and 9238 transitions. [2021-11-07 02:16:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:07,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 33 [2021-11-07 02:16:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:07,661 INFO L225 Difference]: With dead ends: 6646 [2021-11-07 02:16:07,662 INFO L226 Difference]: Without dead ends: 3803 [2021-11-07 02:16:07,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2021-11-07 02:16:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 2871. [2021-11-07 02:16:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 1.388850174216028) internal successors, (3986), 2870 states have internal predecessors, (3986), 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 02:16:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 3986 transitions. [2021-11-07 02:16:07,935 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 3986 transitions. Word has length 33 [2021-11-07 02:16:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 2871 states and 3986 transitions. [2021-11-07 02:16:07,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 02:16:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 3986 transitions. [2021-11-07 02:16:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:16:07,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:07,943 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:07,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:08,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:08,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1690261658, now seen corresponding path program 1 times [2021-11-07 02:16:08,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:08,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350643351] [2021-11-07 02:16:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:08,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:08,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:08,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:16:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:09,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:09,375 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 02:16:09,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:09,621 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 02:16:09,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:09,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350643351] [2021-11-07 02:16:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350643351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:09,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:09,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 02:16:09,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062930346] [2021-11-07 02:16:09,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:16:09,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:16:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:09,625 INFO L87 Difference]: Start difference. First operand 2871 states and 3986 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 02:16:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:11,870 INFO L93 Difference]: Finished difference Result 8555 states and 11891 transitions. [2021-11-07 02:16:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 36 [2021-11-07 02:16:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:11,910 INFO L225 Difference]: With dead ends: 8555 [2021-11-07 02:16:11,911 INFO L226 Difference]: Without dead ends: 5693 [2021-11-07 02:16:11,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:16:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5693 states. [2021-11-07 02:16:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5693 to 5465. [2021-11-07 02:16:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 1.3916544655929721) internal successors, (7604), 5464 states have internal predecessors, (7604), 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 02:16:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 7604 transitions. [2021-11-07 02:16:12,266 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 7604 transitions. Word has length 36 [2021-11-07 02:16:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:12,266 INFO L470 AbstractCegarLoop]: Abstraction has 5465 states and 7604 transitions. [2021-11-07 02:16:12,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 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 02:16:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 7604 transitions. [2021-11-07 02:16:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:16:12,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:12,275 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] [2021-11-07 02:16:12,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:12,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:12,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1219356503, now seen corresponding path program 1 times [2021-11-07 02:16:12,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:12,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393347822] [2021-11-07 02:16:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:12,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:12,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:12,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:16:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:13,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:13,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:13,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393347822] [2021-11-07 02:16:13,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393347822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:13,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:13,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:13,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677905660] [2021-11-07 02:16:13,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:13,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:13,698 INFO L87 Difference]: Start difference. First operand 5465 states and 7604 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:16:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:14,318 INFO L93 Difference]: Finished difference Result 14169 states and 19819 transitions. [2021-11-07 02:16:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2021-11-07 02:16:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:14,371 INFO L225 Difference]: With dead ends: 14169 [2021-11-07 02:16:14,372 INFO L226 Difference]: Without dead ends: 8732 [2021-11-07 02:16:14,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8732 states. [2021-11-07 02:16:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8732 to 8711. [2021-11-07 02:16:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8711 states, 8710 states have (on average 1.4028702640642938) internal successors, (12219), 8710 states have internal predecessors, (12219), 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 02:16:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8711 states to 8711 states and 12219 transitions. [2021-11-07 02:16:14,935 INFO L78 Accepts]: Start accepts. Automaton has 8711 states and 12219 transitions. Word has length 56 [2021-11-07 02:16:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:14,936 INFO L470 AbstractCegarLoop]: Abstraction has 8711 states and 12219 transitions. [2021-11-07 02:16:14,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:16:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8711 states and 12219 transitions. [2021-11-07 02:16:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:16:14,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:14,944 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] [2021-11-07 02:16:14,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:15,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:15,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:15,167 INFO L85 PathProgramCache]: Analyzing trace with hash 32756997, now seen corresponding path program 1 times [2021-11-07 02:16:15,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:15,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018379340] [2021-11-07 02:16:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:15,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:15,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:15,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:15,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:16:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:16,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:16,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:16,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018379340] [2021-11-07 02:16:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018379340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:16,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:16,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:16,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837536805] [2021-11-07 02:16:16,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:16,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:16,532 INFO L87 Difference]: Start difference. First operand 8711 states and 12219 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 02:16:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:17,494 INFO L93 Difference]: Finished difference Result 22979 states and 32257 transitions. [2021-11-07 02:16:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-07 02:16:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:17,579 INFO L225 Difference]: With dead ends: 22979 [2021-11-07 02:16:17,580 INFO L226 Difference]: Without dead ends: 14296 [2021-11-07 02:16:17,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14296 states. [2021-11-07 02:16:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14296 to 14253. [2021-11-07 02:16:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14253 states, 14252 states have (on average 1.4042941341566095) internal successors, (20014), 14252 states have internal predecessors, (20014), 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 02:16:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14253 states to 14253 states and 20014 transitions. [2021-11-07 02:16:18,385 INFO L78 Accepts]: Start accepts. Automaton has 14253 states and 20014 transitions. Word has length 60 [2021-11-07 02:16:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:18,385 INFO L470 AbstractCegarLoop]: Abstraction has 14253 states and 20014 transitions. [2021-11-07 02:16:18,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 02:16:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 14253 states and 20014 transitions. [2021-11-07 02:16:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:16:18,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:18,394 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] [2021-11-07 02:16:18,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:16:18,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:18,619 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash -282449294, now seen corresponding path program 1 times [2021-11-07 02:16:18,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:18,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877223413] [2021-11-07 02:16:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:18,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:18,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:18,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:16:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:16:19,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:16:20,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:20,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877223413] [2021-11-07 02:16:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877223413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:20,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:20,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:20,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108860645] [2021-11-07 02:16:20,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:20,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:20,017 INFO L87 Difference]: Start difference. First operand 14253 states and 20014 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:16:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:21,015 INFO L93 Difference]: Finished difference Result 36319 states and 50814 transitions. [2021-11-07 02:16:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 71 [2021-11-07 02:16:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:21,082 INFO L225 Difference]: With dead ends: 36319 [2021-11-07 02:16:21,082 INFO L226 Difference]: Without dead ends: 22094 [2021-11-07 02:16:21,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22094 states. [2021-11-07 02:16:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22094 to 22012. [2021-11-07 02:16:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22012 states, 22011 states have (on average 1.3951660533369679) internal successors, (30709), 22011 states have internal predecessors, (30709), 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 02:16:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22012 states to 22012 states and 30709 transitions. [2021-11-07 02:16:22,207 INFO L78 Accepts]: Start accepts. Automaton has 22012 states and 30709 transitions. Word has length 71 [2021-11-07 02:16:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:22,207 INFO L470 AbstractCegarLoop]: Abstraction has 22012 states and 30709 transitions. [2021-11-07 02:16:22,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 02:16:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22012 states and 30709 transitions. [2021-11-07 02:16:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:16:22,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:22,222 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 02:16:22,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:22,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash -220557375, now seen corresponding path program 1 times [2021-11-07 02:16:22,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:22,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342334052] [2021-11-07 02:16:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:22,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:22,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:22,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:16:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:23,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:16:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:23,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:24,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:24,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342334052] [2021-11-07 02:16:24,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342334052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:24,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:24,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:24,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422828980] [2021-11-07 02:16:24,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:24,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:24,033 INFO L87 Difference]: Start difference. First operand 22012 states and 30709 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 02:16:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:26,933 INFO L93 Difference]: Finished difference Result 36847 states and 51412 transitions. [2021-11-07 02:16:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 73 [2021-11-07 02:16:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:26,966 INFO L225 Difference]: With dead ends: 36847 [2021-11-07 02:16:26,966 INFO L226 Difference]: Without dead ends: 14831 [2021-11-07 02:16:26,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:16:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14831 states. [2021-11-07 02:16:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14831 to 14624. [2021-11-07 02:16:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14624 states, 14623 states have (on average 1.396908979005676) internal successors, (20427), 14623 states have internal predecessors, (20427), 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 02:16:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14624 states to 14624 states and 20427 transitions. [2021-11-07 02:16:27,647 INFO L78 Accepts]: Start accepts. Automaton has 14624 states and 20427 transitions. Word has length 73 [2021-11-07 02:16:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:27,648 INFO L470 AbstractCegarLoop]: Abstraction has 14624 states and 20427 transitions. [2021-11-07 02:16:27,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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 02:16:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14624 states and 20427 transitions. [2021-11-07 02:16:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:16:27,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:27,659 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 02:16:27,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:27,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:27,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768365, now seen corresponding path program 1 times [2021-11-07 02:16:27,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:27,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091029965] [2021-11-07 02:16:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:27,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:27,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:16:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:16:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:29,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:29,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:29,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091029965] [2021-11-07 02:16:29,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091029965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:29,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:29,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 02:16:29,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245522215] [2021-11-07 02:16:29,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:16:29,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:29,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:16:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:16:29,732 INFO L87 Difference]: Start difference. First operand 14624 states and 20427 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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 02:16:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:37,597 INFO L93 Difference]: Finished difference Result 120842 states and 168961 transitions. [2021-11-07 02:16:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:16:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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 74 [2021-11-07 02:16:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:37,861 INFO L225 Difference]: With dead ends: 120842 [2021-11-07 02:16:37,861 INFO L226 Difference]: Without dead ends: 106241 [2021-11-07 02:16:37,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:16:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106241 states. [2021-11-07 02:16:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106241 to 23637. [2021-11-07 02:16:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23637 states, 23636 states have (on average 1.4009984768996446) internal successors, (33114), 23636 states have internal predecessors, (33114), 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 02:16:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23637 states to 23637 states and 33114 transitions. [2021-11-07 02:16:40,382 INFO L78 Accepts]: Start accepts. Automaton has 23637 states and 33114 transitions. Word has length 74 [2021-11-07 02:16:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:40,383 INFO L470 AbstractCegarLoop]: Abstraction has 23637 states and 33114 transitions. [2021-11-07 02:16:40,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 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 02:16:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23637 states and 33114 transitions. [2021-11-07 02:16:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:16:40,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:40,398 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 02:16:40,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:40,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:40,622 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1212216311, now seen corresponding path program 1 times [2021-11-07 02:16:40,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:40,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021582188] [2021-11-07 02:16:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:40,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:40,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:40,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:16:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:41,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:16:42,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:42,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021582188] [2021-11-07 02:16:42,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021582188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:42,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:42,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:16:42,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717460937] [2021-11-07 02:16:42,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:42,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:42,133 INFO L87 Difference]: Start difference. First operand 23637 states and 33114 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 02:16:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:48,486 INFO L93 Difference]: Finished difference Result 107124 states and 150791 transitions. [2021-11-07 02:16:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:16:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 02:16:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:48,620 INFO L225 Difference]: With dead ends: 107124 [2021-11-07 02:16:48,620 INFO L226 Difference]: Without dead ends: 83532 [2021-11-07 02:16:48,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:16:48,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83532 states. [2021-11-07 02:16:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83532 to 24037. [2021-11-07 02:16:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 1.394325178898319) internal successors, (33514), 24036 states have internal predecessors, (33514), 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 02:16:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 33514 transitions. [2021-11-07 02:16:51,341 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 33514 transitions. Word has length 76 [2021-11-07 02:16:51,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:51,341 INFO L470 AbstractCegarLoop]: Abstraction has 24037 states and 33514 transitions. [2021-11-07 02:16:51,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 02:16:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 33514 transitions. [2021-11-07 02:16:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:16:51,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:51,351 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:51,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:51,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,556 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -65492515, now seen corresponding path program 1 times [2021-11-07 02:16:51,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:51,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788981494] [2021-11-07 02:16:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:51,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:51,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:51,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:16:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:52,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:52,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788981494] [2021-11-07 02:16:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788981494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:52,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:52,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148631112] [2021-11-07 02:16:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:52,917 INFO L87 Difference]: Start difference. First operand 24037 states and 33514 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 02:16:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:57,420 INFO L93 Difference]: Finished difference Result 56106 states and 78751 transitions. [2021-11-07 02:16:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-11-07 02:16:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:57,466 INFO L225 Difference]: With dead ends: 56106 [2021-11-07 02:16:57,467 INFO L226 Difference]: Without dead ends: 32114 [2021-11-07 02:16:57,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32114 states. [2021-11-07 02:16:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32114 to 32029. [2021-11-07 02:16:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32029 states, 32028 states have (on average 1.4015236667915574) internal successors, (44888), 32028 states have internal predecessors, (44888), 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 02:16:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32029 states to 32029 states and 44888 transitions. [2021-11-07 02:16:59,987 INFO L78 Accepts]: Start accepts. Automaton has 32029 states and 44888 transitions. Word has length 78 [2021-11-07 02:16:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 32029 states and 44888 transitions. [2021-11-07 02:16:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 02:16:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32029 states and 44888 transitions. [2021-11-07 02:16:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:16:59,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:59,997 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:00,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 02:17:00,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:00,222 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1987381019, now seen corresponding path program 1 times [2021-11-07 02:17:00,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:00,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948905177] [2021-11-07 02:17:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:00,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:00,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:00,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:00,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49e0ce2f-1559-4daa-b4b1-98209ec8c5b1/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:17:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:01,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:17:01,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:01,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948905177] [2021-11-07 02:17:01,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948905177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:01,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:01,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:01,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482738330] [2021-11-07 02:17:01,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:01,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:01,482 INFO L87 Difference]: Start difference. First operand 32029 states and 44888 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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)