./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/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_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/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 32bit --witnessprinter.graph.data.programhash 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:33:24,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:33:24,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:33:24,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:33:24,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:33:24,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:33:24,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:33:24,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:33:24,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:33:24,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:33:24,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:33:24,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:33:24,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:33:24,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:33:24,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:33:24,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:33:24,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:33:24,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:33:24,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:33:24,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:33:24,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:33:24,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:33:24,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:33:24,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:33:24,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:33:24,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:33:24,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:33:24,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:33:24,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:33:24,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:33:24,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:33:24,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:33:24,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:33:24,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:33:24,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:33:24,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:33:24,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:33:24,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:33:24,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:33:24,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:33:24,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:33:24,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:33:24,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:33:24,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:33:24,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:33:24,753 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:33:24,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:33:24,754 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:33:24,754 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:33:24,755 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:33:24,755 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:33:24,755 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:33:24,756 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:33:24,756 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:33:24,756 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:33:24,757 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:33:24,757 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:33:24,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:33:24,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:33:24,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:33:24,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:33:24,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:33:24,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:33:24,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:33:24,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:33:24,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:33:24,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:33:24,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:33:24,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:33:24,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:33:24,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:33:24,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:33:24,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:24,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:33:24,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:33:24,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:33:24,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:33:24,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:33:24,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:33:24,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:33:24,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:33:24,765 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_6c32f575-b82f-47fc-9187-7244eb983cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 [2021-11-07 01:33:24,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:33:25,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:33:25,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:33:25,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:33:25,042 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:33:25,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-07 01:33:25,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/f35e6c7a9/f23fd06f5f604c4894e6c5db993154c5/FLAG4a983223d [2021-11-07 01:33:25,721 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:33:25,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-07 01:33:25,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/f35e6c7a9/f23fd06f5f604c4894e6c5db993154c5/FLAG4a983223d [2021-11-07 01:33:25,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/f35e6c7a9/f23fd06f5f604c4894e6c5db993154c5 [2021-11-07 01:33:25,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:33:25,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:33:25,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:25,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:33:25,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:33:25,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:25" (1/1) ... [2021-11-07 01:33:25,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e99b931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:25, skipping insertion in model container [2021-11-07 01:33:25,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:25" (1/1) ... [2021-11-07 01:33:25,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:33:26,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:26,705 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_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-07 01:33:26,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:26,848 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 01:33:26,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14effecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:26, skipping insertion in model container [2021-11-07 01:33:26,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:26,849 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:33:26,852 INFO L168 Benchmark]: Toolchain (without parser) took 876.04 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 53.1 MB in the beginning and 107.3 MB in the end (delta: -54.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:33:26,854 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 63.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:33:26,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 871.38 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 52.9 MB in the beginning and 107.3 MB in the end (delta: -54.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:33:26,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 63.9 MB in the beginning and 63.9 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 871.38 ms. Allocated memory was 90.2 MB in the beginning and 144.7 MB in the end (delta: 54.5 MB). Free memory was 52.9 MB in the beginning and 107.3 MB in the end (delta: -54.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2400]: 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_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/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_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/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 32bit --witnessprinter.graph.data.programhash 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:33:29,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:33:29,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:33:29,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:33:29,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:33:29,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:33:29,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:33:29,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:33:29,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:33:29,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:33:29,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:33:29,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:33:29,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:33:29,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:33:29,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:33:29,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:33:29,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:33:29,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:33:29,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:33:29,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:33:29,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:33:29,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:33:29,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:33:29,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:33:29,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:33:29,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:33:29,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:33:29,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:33:29,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:33:29,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:33:29,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:33:29,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:33:29,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:33:29,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:33:29,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:33:29,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:33:29,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:33:29,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:33:29,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:33:29,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:33:29,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:33:29,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:33:29,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:33:29,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:33:29,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:33:29,289 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:33:29,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:33:29,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:33:29,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:33:29,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:33:29,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:33:29,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:33:29,291 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:33:29,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:33:29,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:33:29,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:33:29,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:33:29,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:33:29,292 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:33:29,292 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:33:29,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:33:29,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:33:29,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:33:29,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:33:29,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:33:29,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:33:29,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:33:29,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:33:29,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:29,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:33:29,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:33:29,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:33:29,295 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:33:29,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:33:29,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:33:29,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:33:29,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:33:29,295 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_6c32f575-b82f-47fc-9187-7244eb983cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77340ea3311b00efe6580b7964ad9e7e4d288fea0ba2d6706c8abdac4c4c4bb5 [2021-11-07 01:33:29,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:33:29,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:33:29,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:33:29,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:33:29,697 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:33:29,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-07 01:33:29,763 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/eb463995e/c4cb4578be994ceaa7fafc1c2f6a3c34/FLAG028a9c834 [2021-11-07 01:33:30,349 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:33:30,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c [2021-11-07 01:33:30,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/eb463995e/c4cb4578be994ceaa7fafc1c2f6a3c34/FLAG028a9c834 [2021-11-07 01:33:30,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/data/eb463995e/c4cb4578be994ceaa7fafc1c2f6a3c34 [2021-11-07 01:33:30,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:33:30,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:33:30,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:30,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:33:30,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:33:30,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:30" (1/1) ... [2021-11-07 01:33:30,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ac93f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:30, skipping insertion in model container [2021-11-07 01:33:30,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:33:30" (1/1) ... [2021-11-07 01:33:30,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:33:30,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:31,158 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_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-07 01:33:31,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:31,285 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:33:31,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:33:31,382 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_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-07 01:33:31,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:31,434 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:33:31,536 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_6c32f575-b82f-47fc-9187-7244eb983cc8/sv-benchmarks/c/product-lines/email_spec27_product30.cil.c[47628,47641] [2021-11-07 01:33:31,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:33:31,645 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:33:31,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31 WrapperNode [2021-11-07 01:33:31,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:33:31,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:31,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:33:31,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:33:31,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:33:31,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:33:31,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:33:31,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:33:31,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:33:31,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:33:31,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:33:31,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:33:31,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (1/1) ... [2021-11-07 01:33:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:33:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:33:31,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:33:32,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:33:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:33:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:33:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:33:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:33:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:33:36,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:33:36,478 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:33:36,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:36 BoogieIcfgContainer [2021-11-07 01:33:36,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:33:36,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:33:36,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:33:36,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:33:36,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:33:30" (1/3) ... [2021-11-07 01:33:36,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7334c2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:36, skipping insertion in model container [2021-11-07 01:33:36,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:33:31" (2/3) ... [2021-11-07 01:33:36,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7334c2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:33:36, skipping insertion in model container [2021-11-07 01:33:36,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:33:36" (3/3) ... [2021-11-07 01:33:36,489 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product30.cil.c [2021-11-07 01:33:36,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:33:36,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:33:36,546 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:33:36,552 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 01:33:36,552 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:33:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 523 states, 520 states have (on average 1.7653846153846153) internal successors, (918), 522 states have internal predecessors, (918), 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 01:33:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:33:36,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:36,594 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, 1, 1, 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 01:33:36,595 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1232814721, now seen corresponding path program 1 times [2021-11-07 01:33:36,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:36,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639912266] [2021-11-07 01:33:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:36,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:36,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:36,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:36,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:33:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:33:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:37,369 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 01:33:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:37,554 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 01:33:37,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:37,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639912266] [2021-11-07 01:33:37,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639912266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:37,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:37,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:33:37,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239475032] [2021-11-07 01:33:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:33:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:33:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:33:37,590 INFO L87 Difference]: Start difference. First operand has 523 states, 520 states have (on average 1.7653846153846153) internal successors, (918), 522 states have internal predecessors, (918), 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 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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 01:33:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:37,672 INFO L93 Difference]: Finished difference Result 804 states and 1395 transitions. [2021-11-07 01:33:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:33:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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 62 [2021-11-07 01:33:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:37,698 INFO L225 Difference]: With dead ends: 804 [2021-11-07 01:33:37,699 INFO L226 Difference]: Without dead ends: 506 [2021-11-07 01:33:37,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:33:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-07 01:33:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-11-07 01:33:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 1.757936507936508) internal successors, (886), 505 states have internal predecessors, (886), 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 01:33:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 886 transitions. [2021-11-07 01:33:37,804 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 886 transitions. Word has length 62 [2021-11-07 01:33:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:37,804 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 886 transitions. [2021-11-07 01:33:37,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 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 01:33:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 886 transitions. [2021-11-07 01:33:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:33:37,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:37,815 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, 1, 1, 1, 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 01:33:37,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:38,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,030 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:38,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1274086930, now seen corresponding path program 1 times [2021-11-07 01:33:38,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:38,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663657503] [2021-11-07 01:33:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:38,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:38,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:38,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:38,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:33:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:38,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:38,735 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 01:33:38,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:38,906 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 01:33:38,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:38,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663657503] [2021-11-07 01:33:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663657503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:38,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:38,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555655947] [2021-11-07 01:33:38,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:38,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:38,911 INFO L87 Difference]: Start difference. First operand 506 states and 886 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 01:33:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:39,019 INFO L93 Difference]: Finished difference Result 1488 states and 2610 transitions. [2021-11-07 01:33:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 63 [2021-11-07 01:33:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:39,027 INFO L225 Difference]: With dead ends: 1488 [2021-11-07 01:33:39,027 INFO L226 Difference]: Without dead ends: 997 [2021-11-07 01:33:39,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 01:33:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-07 01:33:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 505. [2021-11-07 01:33:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.7514910536779325) internal successors, (881), 504 states have internal predecessors, (881), 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 01:33:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 881 transitions. [2021-11-07 01:33:39,072 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 881 transitions. Word has length 63 [2021-11-07 01:33:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:39,073 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 881 transitions. [2021-11-07 01:33:39,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 01:33:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 881 transitions. [2021-11-07 01:33:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:33:39,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:39,081 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, 1, 1, 1, 1, 1, 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 01:33:39,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:39,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:39,296 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 506245844, now seen corresponding path program 1 times [2021-11-07 01:33:39,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:39,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61615694] [2021-11-07 01:33:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:39,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:39,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:39,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:33:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:39,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:40,002 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 01:33:40,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:40,228 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 01:33:40,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:40,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61615694] [2021-11-07 01:33:40,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61615694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:40,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:40,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:40,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385460308] [2021-11-07 01:33:40,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:40,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:40,231 INFO L87 Difference]: Start difference. First operand 505 states and 881 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 01:33:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:40,511 INFO L93 Difference]: Finished difference Result 1937 states and 3386 transitions. [2021-11-07 01:33:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 65 [2021-11-07 01:33:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:40,524 INFO L225 Difference]: With dead ends: 1937 [2021-11-07 01:33:40,525 INFO L226 Difference]: Without dead ends: 1450 [2021-11-07 01:33:40,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-11-07 01:33:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 504. [2021-11-07 01:33:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 502 states have (on average 1.747011952191235) internal successors, (877), 503 states have internal predecessors, (877), 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 01:33:40,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 877 transitions. [2021-11-07 01:33:40,564 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 877 transitions. Word has length 65 [2021-11-07 01:33:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:40,564 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 877 transitions. [2021-11-07 01:33:40,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 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 01:33:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 877 transitions. [2021-11-07 01:33:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:33:40,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:40,569 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:40,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:33:40,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:40,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1516164825, now seen corresponding path program 1 times [2021-11-07 01:33:40,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:40,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307128191] [2021-11-07 01:33:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:40,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:40,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:40,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:40,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:33:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:33:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:41,473 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 01:33:41,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:41,658 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 01:33:41,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:41,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307128191] [2021-11-07 01:33:41,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307128191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:41,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:41,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:41,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697066044] [2021-11-07 01:33:41,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:41,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:41,661 INFO L87 Difference]: Start difference. First operand 504 states and 877 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 01:33:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:41,739 INFO L93 Difference]: Finished difference Result 1005 states and 1751 transitions. [2021-11-07 01:33:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 66 [2021-11-07 01:33:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:41,743 INFO L225 Difference]: With dead ends: 1005 [2021-11-07 01:33:41,744 INFO L226 Difference]: Without dead ends: 509 [2021-11-07 01:33:41,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 01:33:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-07 01:33:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 504. [2021-11-07 01:33:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 502 states have (on average 1.7410358565737052) internal successors, (874), 503 states have internal predecessors, (874), 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 01:33:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 874 transitions. [2021-11-07 01:33:41,778 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 874 transitions. Word has length 66 [2021-11-07 01:33:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:41,779 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 874 transitions. [2021-11-07 01:33:41,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 01:33:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 874 transitions. [2021-11-07 01:33:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:33:41,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:41,781 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, 1, 1, 1, 1, 1, 1, 1, 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 01:33:41,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -649267268, now seen corresponding path program 1 times [2021-11-07 01:33:41,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:41,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396603763] [2021-11-07 01:33:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:41,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:41,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:41,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:42,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:33:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:33:42,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:42,696 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 01:33:42,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:42,910 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 01:33:42,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:42,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396603763] [2021-11-07 01:33:42,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396603763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:42,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:42,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:42,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456818586] [2021-11-07 01:33:42,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:42,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:42,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:42,913 INFO L87 Difference]: Start difference. First operand 504 states and 874 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 01:33:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:43,175 INFO L93 Difference]: Finished difference Result 1924 states and 3362 transitions. [2021-11-07 01:33:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:33:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 67 [2021-11-07 01:33:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:43,185 INFO L225 Difference]: With dead ends: 1924 [2021-11-07 01:33:43,185 INFO L226 Difference]: Without dead ends: 1446 [2021-11-07 01:33:43,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-11-07 01:33:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 504. [2021-11-07 01:33:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 502 states have (on average 1.7350597609561753) internal successors, (871), 503 states have internal predecessors, (871), 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 01:33:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 871 transitions. [2021-11-07 01:33:43,233 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 871 transitions. Word has length 67 [2021-11-07 01:33:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 871 transitions. [2021-11-07 01:33:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 01:33:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 871 transitions. [2021-11-07 01:33:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:33:43,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:43,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:43,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:43,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:43,455 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1696413047, now seen corresponding path program 1 times [2021-11-07 01:33:43,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:43,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318675776] [2021-11-07 01:33:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:43,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:43,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:43,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:33:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:43,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:44,050 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 01:33:44,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:44,208 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 01:33:44,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318675776] [2021-11-07 01:33:44,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318675776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:44,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:44,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:33:44,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703784164] [2021-11-07 01:33:44,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:33:44,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:33:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:33:44,211 INFO L87 Difference]: Start difference. First operand 504 states and 871 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 01:33:44,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:44,316 INFO L93 Difference]: Finished difference Result 1246 states and 2160 transitions. [2021-11-07 01:33:44,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:33:44,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 69 [2021-11-07 01:33:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:44,323 INFO L225 Difference]: With dead ends: 1246 [2021-11-07 01:33:44,323 INFO L226 Difference]: Without dead ends: 982 [2021-11-07 01:33:44,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 01:33:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-07 01:33:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 718. [2021-11-07 01:33:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 716 states have (on average 1.7625698324022345) internal successors, (1262), 717 states have internal predecessors, (1262), 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 01:33:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1262 transitions. [2021-11-07 01:33:44,402 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1262 transitions. Word has length 69 [2021-11-07 01:33:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:44,402 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1262 transitions. [2021-11-07 01:33:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 01:33:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1262 transitions. [2021-11-07 01:33:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:33:44,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:44,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:44,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:44,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:44,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:44,621 INFO L85 PathProgramCache]: Analyzing trace with hash 581591880, now seen corresponding path program 1 times [2021-11-07 01:33:44,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:44,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612595665] [2021-11-07 01:33:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:44,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:44,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:44,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:44,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:33:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:45,277 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 01:33:45,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:45,480 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 01:33:45,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:45,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612595665] [2021-11-07 01:33:45,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612595665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:45,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:45,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:45,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838173126] [2021-11-07 01:33:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:45,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:45,482 INFO L87 Difference]: Start difference. First operand 718 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 01:33:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:45,589 INFO L93 Difference]: Finished difference Result 1778 states and 3134 transitions. [2021-11-07 01:33:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-07 01:33:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:45,597 INFO L225 Difference]: With dead ends: 1778 [2021-11-07 01:33:45,597 INFO L226 Difference]: Without dead ends: 1144 [2021-11-07 01:33:45,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 01:33:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-11-07 01:33:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 880. [2021-11-07 01:33:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 1.7722095671981777) internal successors, (1556), 879 states have internal predecessors, (1556), 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 01:33:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1556 transitions. [2021-11-07 01:33:45,667 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1556 transitions. Word has length 81 [2021-11-07 01:33:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:45,668 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1556 transitions. [2021-11-07 01:33:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 01:33:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1556 transitions. [2021-11-07 01:33:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:33:45,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:45,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:45,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:45,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:45,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1578572441, now seen corresponding path program 1 times [2021-11-07 01:33:45,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:45,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757220363] [2021-11-07 01:33:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:45,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:45,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:45,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:33:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:46,648 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 01:33:46,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:46,859 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 01:33:46,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:46,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757220363] [2021-11-07 01:33:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757220363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:46,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:46,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:46,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722968763] [2021-11-07 01:33:46,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:46,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:46,861 INFO L87 Difference]: Start difference. First operand 880 states and 1556 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 01:33:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:46,993 INFO L93 Difference]: Finished difference Result 2296 states and 4081 transitions. [2021-11-07 01:33:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-07 01:33:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:47,004 INFO L225 Difference]: With dead ends: 2296 [2021-11-07 01:33:47,004 INFO L226 Difference]: Without dead ends: 1508 [2021-11-07 01:33:47,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 01:33:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-11-07 01:33:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1244. [2021-11-07 01:33:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1242 states have (on average 1.78743961352657) internal successors, (2220), 1243 states have internal predecessors, (2220), 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 01:33:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 2220 transitions. [2021-11-07 01:33:47,145 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 2220 transitions. Word has length 82 [2021-11-07 01:33:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 2220 transitions. [2021-11-07 01:33:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 01:33:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 2220 transitions. [2021-11-07 01:33:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:33:47,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:47,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:47,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:47,367 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash 591241206, now seen corresponding path program 1 times [2021-11-07 01:33:47,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:47,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305766998] [2021-11-07 01:33:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:47,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:47,369 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:47,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:33:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:33:48,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:48,259 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 01:33:48,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:48,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305766998] [2021-11-07 01:33:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305766998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:48,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:48,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968883800] [2021-11-07 01:33:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:48,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:48,262 INFO L87 Difference]: Start difference. First operand 1244 states and 2220 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 01:33:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:48,431 INFO L93 Difference]: Finished difference Result 3368 states and 6042 transitions. [2021-11-07 01:33:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-07 01:33:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:48,446 INFO L225 Difference]: With dead ends: 3368 [2021-11-07 01:33:48,446 INFO L226 Difference]: Without dead ends: 2224 [2021-11-07 01:33:48,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 01:33:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-11-07 01:33:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1960. [2021-11-07 01:33:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1958 states have (on average 1.8013278855975485) internal successors, (3527), 1959 states have internal predecessors, (3527), 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 01:33:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3527 transitions. [2021-11-07 01:33:48,616 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3527 transitions. Word has length 83 [2021-11-07 01:33:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:48,616 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 3527 transitions. [2021-11-07 01:33:48,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 01:33:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3527 transitions. [2021-11-07 01:33:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:33:48,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:48,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:48,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:48,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,837 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -529031818, now seen corresponding path program 1 times [2021-11-07 01:33:48,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:48,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113395566] [2021-11-07 01:33:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:48,839 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:48,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:48,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:33:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:49,571 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 01:33:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:49,789 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 01:33:49,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:49,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113395566] [2021-11-07 01:33:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113395566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:49,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:49,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422264288] [2021-11-07 01:33:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:49,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:49,792 INFO L87 Difference]: Start difference. First operand 1960 states and 3527 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:50,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:50,024 INFO L93 Difference]: Finished difference Result 5252 states and 9482 transitions. [2021-11-07 01:33:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:50,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:33:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:50,049 INFO L225 Difference]: With dead ends: 5252 [2021-11-07 01:33:50,049 INFO L226 Difference]: Without dead ends: 3426 [2021-11-07 01:33:50,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 01:33:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-11-07 01:33:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3162. [2021-11-07 01:33:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3162 states, 3160 states have (on average 1.808860759493671) internal successors, (5716), 3161 states have internal predecessors, (5716), 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 01:33:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 5716 transitions. [2021-11-07 01:33:50,337 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 5716 transitions. Word has length 84 [2021-11-07 01:33:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:50,337 INFO L470 AbstractCegarLoop]: Abstraction has 3162 states and 5716 transitions. [2021-11-07 01:33:50,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 5716 transitions. [2021-11-07 01:33:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:33:50,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:50,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:50,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:50,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:50,560 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash 637069287, now seen corresponding path program 1 times [2021-11-07 01:33:50,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:50,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215401217] [2021-11-07 01:33:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:50,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:50,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:33:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:51,398 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 01:33:51,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:51,577 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 01:33:51,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:51,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215401217] [2021-11-07 01:33:51,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215401217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:51,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:51,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779402057] [2021-11-07 01:33:51,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:51,579 INFO L87 Difference]: Start difference. First operand 3162 states and 5716 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 01:33:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:51,901 INFO L93 Difference]: Finished difference Result 8574 states and 15532 transitions. [2021-11-07 01:33:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 01:33:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:51,939 INFO L225 Difference]: With dead ends: 8574 [2021-11-07 01:33:51,939 INFO L226 Difference]: Without dead ends: 5580 [2021-11-07 01:33:51,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 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 01:33:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-11-07 01:33:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 5316. [2021-11-07 01:33:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5314 states have (on average 1.8120060218291305) internal successors, (9629), 5315 states have internal predecessors, (9629), 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 01:33:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 9629 transitions. [2021-11-07 01:33:52,335 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 9629 transitions. Word has length 85 [2021-11-07 01:33:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:52,337 INFO L470 AbstractCegarLoop]: Abstraction has 5316 states and 9629 transitions. [2021-11-07 01:33:52,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 01:33:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 9629 transitions. [2021-11-07 01:33:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:33:52,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:52,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:52,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:52,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:52,586 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash -85586873, now seen corresponding path program 1 times [2021-11-07 01:33:52,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:52,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720259131] [2021-11-07 01:33:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:52,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:52,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:52,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:33:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:33:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:53,400 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 01:33:53,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:53,608 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 01:33:53,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:53,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720259131] [2021-11-07 01:33:53,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720259131] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:53,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:53,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:33:53,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39501412] [2021-11-07 01:33:53,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:33:53,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:33:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:33:53,610 INFO L87 Difference]: Start difference. First operand 5316 states and 9629 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 01:33:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:54,131 INFO L93 Difference]: Finished difference Result 15494 states and 28113 transitions. [2021-11-07 01:33:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:33:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:33:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:54,179 INFO L225 Difference]: With dead ends: 15494 [2021-11-07 01:33:54,179 INFO L226 Difference]: Without dead ends: 10350 [2021-11-07 01:33:54,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 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 01:33:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10350 states. [2021-11-07 01:33:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10350 to 10086. [2021-11-07 01:33:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10084 states have (on average 1.813367711225704) internal successors, (18286), 10085 states have internal predecessors, (18286), 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 01:33:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 18286 transitions. [2021-11-07 01:33:54,941 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 18286 transitions. Word has length 86 [2021-11-07 01:33:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:54,942 INFO L470 AbstractCegarLoop]: Abstraction has 10086 states and 18286 transitions. [2021-11-07 01:33:54,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 01:33:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 18286 transitions. [2021-11-07 01:33:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:33:54,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:54,958 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:54,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:55,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:55,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1334604823, now seen corresponding path program 1 times [2021-11-07 01:33:55,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:55,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690440552] [2021-11-07 01:33:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:55,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:55,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:55,182 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:55,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:33:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:33:55,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:33:56,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:33:56,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:56,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690440552] [2021-11-07 01:33:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690440552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:56,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:56,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:56,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706712614] [2021-11-07 01:33:56,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:56,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:56,410 INFO L87 Difference]: Start difference. First operand 10086 states and 18286 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 01:33:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:59,341 INFO L93 Difference]: Finished difference Result 24889 states and 45137 transitions. [2021-11-07 01:33:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:33:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 87 [2021-11-07 01:33:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:59,384 INFO L225 Difference]: With dead ends: 24889 [2021-11-07 01:33:59,385 INFO L226 Difference]: Without dead ends: 15053 [2021-11-07 01:33:59,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 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 01:33:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15053 states. [2021-11-07 01:34:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15053 to 10053. [2021-11-07 01:34:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 10051 states have (on average 1.8061884389612974) internal successors, (18154), 10052 states have internal predecessors, (18154), 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 01:34:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 18154 transitions. [2021-11-07 01:34:00,274 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 18154 transitions. Word has length 87 [2021-11-07 01:34:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:00,275 INFO L470 AbstractCegarLoop]: Abstraction has 10053 states and 18154 transitions. [2021-11-07 01:34:00,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 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 01:34:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 18154 transitions. [2021-11-07 01:34:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:34:00,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:00,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:00,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:00,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:00,519 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:00,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1094125290, now seen corresponding path program 1 times [2021-11-07 01:34:00,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:00,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448462084] [2021-11-07 01:34:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:00,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:00,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:00,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:00,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:34:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:01,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:01,427 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 01:34:01,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:01,648 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 01:34:01,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448462084] [2021-11-07 01:34:01,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448462084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:01,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:01,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:01,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049183593] [2021-11-07 01:34:01,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:01,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:01,651 INFO L87 Difference]: Start difference. First operand 10053 states and 18154 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 01:34:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:02,390 INFO L93 Difference]: Finished difference Result 29409 states and 53171 transitions. [2021-11-07 01:34:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 01:34:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:02,441 INFO L225 Difference]: With dead ends: 29409 [2021-11-07 01:34:02,441 INFO L226 Difference]: Without dead ends: 19535 [2021-11-07 01:34:02,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 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 01:34:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19535 states. [2021-11-07 01:34:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19535 to 19271. [2021-11-07 01:34:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19271 states, 19269 states have (on average 1.8057501686646946) internal successors, (34795), 19270 states have internal predecessors, (34795), 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 01:34:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19271 states to 19271 states and 34795 transitions. [2021-11-07 01:34:03,610 INFO L78 Accepts]: Start accepts. Automaton has 19271 states and 34795 transitions. Word has length 87 [2021-11-07 01:34:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:03,610 INFO L470 AbstractCegarLoop]: Abstraction has 19271 states and 34795 transitions. [2021-11-07 01:34:03,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 01:34:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19271 states and 34795 transitions. [2021-11-07 01:34:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:34:03,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:03,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:03,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:03,843 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1408509833, now seen corresponding path program 1 times [2021-11-07 01:34:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:03,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269018233] [2021-11-07 01:34:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:03,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:03,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:34:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:04,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:04,782 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 01:34:04,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:04,978 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 01:34:04,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269018233] [2021-11-07 01:34:04,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269018233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:04,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:04,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:04,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024626967] [2021-11-07 01:34:04,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:04,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:04,980 INFO L87 Difference]: Start difference. First operand 19271 states and 34795 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 01:34:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:06,317 INFO L93 Difference]: Finished difference Result 57249 states and 103408 transitions. [2021-11-07 01:34:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:06,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:34:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:06,404 INFO L225 Difference]: With dead ends: 57249 [2021-11-07 01:34:06,404 INFO L226 Difference]: Without dead ends: 38161 [2021-11-07 01:34:06,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 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 01:34:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38161 states. [2021-11-07 01:34:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38161 to 37897. [2021-11-07 01:34:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37897 states, 37895 states have (on average 1.8031930333817126) internal successors, (68332), 37896 states have internal predecessors, (68332), 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 01:34:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37897 states to 37897 states and 68332 transitions. [2021-11-07 01:34:08,924 INFO L78 Accepts]: Start accepts. Automaton has 37897 states and 68332 transitions. Word has length 88 [2021-11-07 01:34:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:08,924 INFO L470 AbstractCegarLoop]: Abstraction has 37897 states and 68332 transitions. [2021-11-07 01:34:08,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 01:34:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37897 states and 68332 transitions. [2021-11-07 01:34:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:34:08,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:08,954 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:08,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:09,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:09,160 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash 364431197, now seen corresponding path program 1 times [2021-11-07 01:34:09,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:09,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930815098] [2021-11-07 01:34:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:09,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:09,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:09,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:34:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:34:10,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:34:10,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:10,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930815098] [2021-11-07 01:34:10,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930815098] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:10,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:10,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:10,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145274068] [2021-11-07 01:34:10,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:10,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:10,407 INFO L87 Difference]: Start difference. First operand 37897 states and 68332 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:16,756 INFO L93 Difference]: Finished difference Result 146997 states and 264896 transitions. [2021-11-07 01:34:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:34:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 01:34:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:17,178 INFO L225 Difference]: With dead ends: 146997 [2021-11-07 01:34:17,178 INFO L226 Difference]: Without dead ends: 109349 [2021-11-07 01:34:17,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:34:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109349 states. [2021-11-07 01:34:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109349 to 37639. [2021-11-07 01:34:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37639 states, 37637 states have (on average 1.7881340170576825) internal successors, (67300), 37638 states have internal predecessors, (67300), 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 01:34:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37639 states to 37639 states and 67300 transitions. [2021-11-07 01:34:20,832 INFO L78 Accepts]: Start accepts. Automaton has 37639 states and 67300 transitions. Word has length 89 [2021-11-07 01:34:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:20,833 INFO L470 AbstractCegarLoop]: Abstraction has 37639 states and 67300 transitions. [2021-11-07 01:34:20,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37639 states and 67300 transitions. [2021-11-07 01:34:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:34:20,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:20,856 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:20,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:21,072 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1666248827, now seen corresponding path program 1 times [2021-11-07 01:34:21,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:21,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192157066] [2021-11-07 01:34:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:21,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:21,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:21,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:34:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:21,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:21,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:22,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:22,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:22,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192157066] [2021-11-07 01:34:22,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192157066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:22,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:22,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:22,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157100747] [2021-11-07 01:34:22,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:22,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:22,322 INFO L87 Difference]: Start difference. First operand 37639 states and 67300 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 01:34:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:24,218 INFO L93 Difference]: Finished difference Result 75287 states and 134628 transitions. [2021-11-07 01:34:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 89 [2021-11-07 01:34:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:24,288 INFO L225 Difference]: With dead ends: 75287 [2021-11-07 01:34:24,288 INFO L226 Difference]: Without dead ends: 37903 [2021-11-07 01:34:24,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 174 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 01:34:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37903 states. [2021-11-07 01:34:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37903 to 37639. [2021-11-07 01:34:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37639 states, 37637 states have (on average 1.7847331083773945) internal successors, (67172), 37638 states have internal predecessors, (67172), 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 01:34:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37639 states to 37639 states and 67172 transitions. [2021-11-07 01:34:26,659 INFO L78 Accepts]: Start accepts. Automaton has 37639 states and 67172 transitions. Word has length 89 [2021-11-07 01:34:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:26,659 INFO L470 AbstractCegarLoop]: Abstraction has 37639 states and 67172 transitions. [2021-11-07 01:34:26,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 01:34:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 37639 states and 67172 transitions. [2021-11-07 01:34:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:34:26,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:26,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:26,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:26,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:26,879 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1957193240, now seen corresponding path program 1 times [2021-11-07 01:34:26,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:26,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072905045] [2021-11-07 01:34:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:26,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:26,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:26,881 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:26,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:34:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:27,907 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 01:34:27,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:28,101 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 01:34:28,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:28,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072905045] [2021-11-07 01:34:28,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072905045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:28,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:28,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501883040] [2021-11-07 01:34:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:28,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:28,105 INFO L87 Difference]: Start difference. First operand 37639 states and 67172 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 01:34:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:31,387 INFO L93 Difference]: Finished difference Result 104513 states and 186158 transitions. [2021-11-07 01:34:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2021-11-07 01:34:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:31,526 INFO L225 Difference]: With dead ends: 104513 [2021-11-07 01:34:31,526 INFO L226 Difference]: Without dead ends: 67089 [2021-11-07 01:34:31,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 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 01:34:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67089 states. [2021-11-07 01:34:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67089 to 66825. [2021-11-07 01:34:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66825 states, 66823 states have (on average 1.7752719871900393) internal successors, (118629), 66824 states have internal predecessors, (118629), 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 01:34:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66825 states to 66825 states and 118629 transitions. [2021-11-07 01:34:35,522 INFO L78 Accepts]: Start accepts. Automaton has 66825 states and 118629 transitions. Word has length 89 [2021-11-07 01:34:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:35,522 INFO L470 AbstractCegarLoop]: Abstraction has 66825 states and 118629 transitions. [2021-11-07 01:34:35,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 01:34:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 66825 states and 118629 transitions. [2021-11-07 01:34:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:34:35,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:35,537 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:35,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:35,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:35,738 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -245077055, now seen corresponding path program 1 times [2021-11-07 01:34:35,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:35,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97364435] [2021-11-07 01:34:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:35,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:35,740 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:35,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:34:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:37,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97364435] [2021-11-07 01:34:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97364435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1265751381] [2021-11-07 01:34:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:37,061 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:37,064 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:37,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c32f575-b82f-47fc-9187-7244eb983cc8/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process