./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product32.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_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/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_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/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_8c7398ee-418c-44fc-86ec-30318b83e4de/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 6b54f48e5606af61de5b12570bc2e15a173e4036917e2e3bdec28cef1386724b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:33,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:33,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:33,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:33,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:33,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:33,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:33,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:33,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:33,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:33,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:33,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:33,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:33,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:33,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:33,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:33,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:33,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:33,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:33,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:33,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:33,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:33,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:33,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:33,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:33,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:33,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:33,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:33,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:33,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:33,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:33,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:33,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:33,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:33,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:33,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:33,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:33,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:33,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:33,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:33,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:33,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:48:33,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:33,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:33,852 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:33,852 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:33,853 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:33,853 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:33,854 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:33,854 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:33,855 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:33,855 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:33,855 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:33,856 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:33,856 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:33,857 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:33,857 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:33,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:33,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:33,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:33,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:33,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:33,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:33,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:33,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:33,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:33,862 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:33,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:33,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:33,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:33,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:33,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:33,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:33,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:33,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:33,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:33,864 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:33,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:33,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:33,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:33,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:33,866 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_8c7398ee-418c-44fc-86ec-30318b83e4de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b54f48e5606af61de5b12570bc2e15a173e4036917e2e3bdec28cef1386724b [2021-11-07 01:48:34,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:34,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:34,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:34,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:34,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:34,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product32.cil.c [2021-11-07 01:48:34,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ee5ec9c6c/4c2ce8013f264aba85df214623bdfda9/FLAGc6f7e3797 [2021-11-07 01:48:34,931 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:34,934 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c [2021-11-07 01:48:34,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ee5ec9c6c/4c2ce8013f264aba85df214623bdfda9/FLAGc6f7e3797 [2021-11-07 01:48:35,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ee5ec9c6c/4c2ce8013f264aba85df214623bdfda9 [2021-11-07 01:48:35,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:35,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:35,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:35,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:35,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:35,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323da030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35, skipping insertion in model container [2021-11-07 01:48:35,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:35,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:35,683 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_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c[27975,27988] [2021-11-07 01:48:35,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:35,946 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 01:48:35,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f671de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35, skipping insertion in model container [2021-11-07 01:48:35,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:35,948 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:35,951 INFO L168 Benchmark]: Toolchain (without parser) took 810.35 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.4 MB in the beginning and 71.9 MB in the end (delta: -21.5 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:35,952 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:35,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 807.76 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.3 MB in the beginning and 71.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:35,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 807.76 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.3 MB in the beginning and 71.9 MB in the end (delta: -21.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1230]: 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_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/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_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/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_8c7398ee-418c-44fc-86ec-30318b83e4de/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 6b54f48e5606af61de5b12570bc2e15a173e4036917e2e3bdec28cef1386724b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:38,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:38,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:38,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:38,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:38,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:38,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:38,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:38,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:38,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:38,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:38,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:38,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:38,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:38,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:38,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:38,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:38,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:38,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:38,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:38,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:38,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:38,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:38,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:38,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:38,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:38,542 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:38,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:38,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:38,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:38,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:38,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:38,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:38,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:38,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:38,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:38,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:38,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:38,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:38,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:38,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:38,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:48:38,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:38,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:38,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:38,617 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:38,618 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:38,618 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:38,618 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:38,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:38,619 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:38,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:38,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:38,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:38,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:38,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:38,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:38,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:38,624 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:38,624 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:38,625 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:38,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:38,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:38,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:38,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:38,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:38,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:38,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:38,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:38,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:38,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:38,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:38,628 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:38,628 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:38,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:38,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:38,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:38,630 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_8c7398ee-418c-44fc-86ec-30318b83e4de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b54f48e5606af61de5b12570bc2e15a173e4036917e2e3bdec28cef1386724b [2021-11-07 01:48:39,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:39,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:39,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:39,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:39,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:39,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product32.cil.c [2021-11-07 01:48:39,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ed4b9e54b/5091067b7c6f4fd38393110167e4b60e/FLAGa75212d7a [2021-11-07 01:48:39,899 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:39,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c [2021-11-07 01:48:39,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ed4b9e54b/5091067b7c6f4fd38393110167e4b60e/FLAGa75212d7a [2021-11-07 01:48:40,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/data/ed4b9e54b/5091067b7c6f4fd38393110167e4b60e [2021-11-07 01:48:40,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:40,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:40,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:40,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:40,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:40,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:40" (1/1) ... [2021-11-07 01:48:40,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cbb784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:40, skipping insertion in model container [2021-11-07 01:48:40,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:40" (1/1) ... [2021-11-07 01:48:40,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:40,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:40,605 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_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c[27975,27988] [2021-11-07 01:48:40,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:40,863 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:40,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:40,966 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_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c[27975,27988] [2021-11-07 01:48:41,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:41,052 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:41,112 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_8c7398ee-418c-44fc-86ec-30318b83e4de/sv-benchmarks/c/product-lines/email_spec27_product32.cil.c[27975,27988] [2021-11-07 01:48:41,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:41,255 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:41,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41 WrapperNode [2021-11-07 01:48:41,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:41,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:41,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:41,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:41,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:41,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:48:41,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:48:41,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:48:41,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:48:41,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:48:41,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:48:41,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:48:41,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (1/1) ... [2021-11-07 01:48:41,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:41,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:48:41,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:48:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:48:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:48:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:48:41,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:48:41,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:48:41,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:48:48,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:48:48,350 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 01:48:48,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:48 BoogieIcfgContainer [2021-11-07 01:48:48,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:48:48,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:48:48,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:48:48,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:48:48,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:40" (1/3) ... [2021-11-07 01:48:48,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653af848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:48, skipping insertion in model container [2021-11-07 01:48:48,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:41" (2/3) ... [2021-11-07 01:48:48,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653af848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:48:48, skipping insertion in model container [2021-11-07 01:48:48,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:48:48" (3/3) ... [2021-11-07 01:48:48,364 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product32.cil.c [2021-11-07 01:48:48,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:48:48,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:48:48,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:48:48,454 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 01:48:48,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:48:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 1134 states, 1127 states have (on average 1.763975155279503) internal successors, (1988), 1133 states have internal predecessors, (1988), 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 01:48:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:48:48,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:48,543 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 01:48:48,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1762277358, now seen corresponding path program 1 times [2021-11-07 01:48:48,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:48,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593614228] [2021-11-07 01:48:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:48,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:48,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:48,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:48:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:48:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:49,334 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 01:48:49,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:49,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:49,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593614228] [2021-11-07 01:48:49,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593614228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:49,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:49,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:48:49,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269962981] [2021-11-07 01:48:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:48:49,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:48:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:48:49,556 INFO L87 Difference]: Start difference. First operand has 1134 states, 1127 states have (on average 1.763975155279503) internal successors, (1988), 1133 states have internal predecessors, (1988), 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 32.5) internal successors, (65), 2 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 01:48:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:49,636 INFO L93 Difference]: Finished difference Result 1983 states and 3453 transitions. [2021-11-07 01:48:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:48:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 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 65 [2021-11-07 01:48:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:49,663 INFO L225 Difference]: With dead ends: 1983 [2021-11-07 01:48:49,663 INFO L226 Difference]: Without dead ends: 1104 [2021-11-07 01:48:49,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 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 01:48:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-07 01:48:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2021-11-07 01:48:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1098 states have (on average 1.7568306010928962) internal successors, (1929), 1103 states have internal predecessors, (1929), 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 01:48:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1929 transitions. [2021-11-07 01:48:49,800 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1929 transitions. Word has length 65 [2021-11-07 01:48:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:49,800 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1929 transitions. [2021-11-07 01:48:49,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 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 01:48:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1929 transitions. [2021-11-07 01:48:49,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:48:49,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:49,809 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 01:48:49,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:50,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:50,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:50,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1395268570, now seen corresponding path program 1 times [2021-11-07 01:48:50,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:50,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135270243] [2021-11-07 01:48:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:50,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:50,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:50,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:50,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:48:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:50,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:50,773 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 01:48:50,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:51,010 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 01:48:51,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:51,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135270243] [2021-11-07 01:48:51,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135270243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:51,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:51,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:51,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016060665] [2021-11-07 01:48:51,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:51,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:51,018 INFO L87 Difference]: Start difference. First operand 1104 states and 1929 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 01:48:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:51,217 INFO L93 Difference]: Finished difference Result 3282 states and 5739 transitions. [2021-11-07 01:48:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 01:48:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:51,234 INFO L225 Difference]: With dead ends: 3282 [2021-11-07 01:48:51,234 INFO L226 Difference]: Without dead ends: 2193 [2021-11-07 01:48:51,237 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 01:48:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-11-07 01:48:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1103. [2021-11-07 01:48:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1097 states have (on average 1.7538742023701002) internal successors, (1924), 1102 states have internal predecessors, (1924), 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 01:48:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1924 transitions. [2021-11-07 01:48:51,307 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1924 transitions. Word has length 66 [2021-11-07 01:48:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:51,308 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1924 transitions. [2021-11-07 01:48:51,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 01:48:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1924 transitions. [2021-11-07 01:48:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:48:51,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:51,311 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] [2021-11-07 01:48:51,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:51,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:51,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:51,527 INFO L85 PathProgramCache]: Analyzing trace with hash 737800500, now seen corresponding path program 1 times [2021-11-07 01:48:51,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:51,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357508353] [2021-11-07 01:48:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:51,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:51,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:51,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:48:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:52,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:52,166 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 01:48:52,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:52,385 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 01:48:52,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:52,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357508353] [2021-11-07 01:48:52,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357508353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:52,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:52,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513102351] [2021-11-07 01:48:52,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:52,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:52,388 INFO L87 Difference]: Start difference. First operand 1103 states and 1924 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 01:48:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:52,790 INFO L93 Difference]: Finished difference Result 4329 states and 7558 transitions. [2021-11-07 01:48:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:52,791 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 68 [2021-11-07 01:48:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:52,811 INFO L225 Difference]: With dead ends: 4329 [2021-11-07 01:48:52,811 INFO L226 Difference]: Without dead ends: 3244 [2021-11-07 01:48:52,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 01:48:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-11-07 01:48:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1102. [2021-11-07 01:48:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.7518248175182483) internal successors, (1920), 1101 states have internal predecessors, (1920), 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 01:48:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1920 transitions. [2021-11-07 01:48:52,893 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1920 transitions. Word has length 68 [2021-11-07 01:48:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1920 transitions. [2021-11-07 01:48:52,895 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 01:48:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1920 transitions. [2021-11-07 01:48:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:48:52,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:52,899 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 01:48:52,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:53,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash 902788609, now seen corresponding path program 1 times [2021-11-07 01:48:53,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:53,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091618856] [2021-11-07 01:48:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:53,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:53,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:53,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:48:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:48:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:53,799 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 01:48:53,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:53,989 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 01:48:53,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:53,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091618856] [2021-11-07 01:48:53,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091618856] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:53,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:53,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:53,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373901039] [2021-11-07 01:48:53,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:53,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:53,993 INFO L87 Difference]: Start difference. First operand 1102 states and 1920 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 01:48:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:54,114 INFO L93 Difference]: Finished difference Result 2201 states and 3837 transitions. [2021-11-07 01:48:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:54,115 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 01:48:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:54,123 INFO L225 Difference]: With dead ends: 2201 [2021-11-07 01:48:54,123 INFO L226 Difference]: Without dead ends: 1107 [2021-11-07 01:48:54,125 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 01:48:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-11-07 01:48:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1102. [2021-11-07 01:48:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.7490875912408759) internal successors, (1917), 1101 states have internal predecessors, (1917), 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 01:48:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1917 transitions. [2021-11-07 01:48:54,194 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1917 transitions. Word has length 69 [2021-11-07 01:48:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:54,194 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1917 transitions. [2021-11-07 01:48:54,195 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 01:48:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1917 transitions. [2021-11-07 01:48:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:48:54,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:54,197 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] [2021-11-07 01:48:54,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:54,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:54,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1009558348, now seen corresponding path program 1 times [2021-11-07 01:48:54,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:54,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544749902] [2021-11-07 01:48:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:54,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:54,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:54,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:48:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:48:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:55,148 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 01:48:55,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:55,351 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 01:48:55,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:55,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544749902] [2021-11-07 01:48:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544749902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:55,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:55,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:48:55,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919788716] [2021-11-07 01:48:55,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:55,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:55,353 INFO L87 Difference]: Start difference. First operand 1102 states and 1917 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:55,778 INFO L93 Difference]: Finished difference Result 4316 states and 7534 transitions. [2021-11-07 01:48:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:48:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:55,798 INFO L225 Difference]: With dead ends: 4316 [2021-11-07 01:48:55,798 INFO L226 Difference]: Without dead ends: 3240 [2021-11-07 01:48:55,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 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 01:48:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-11-07 01:48:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 1102. [2021-11-07 01:48:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.7463503649635037) internal successors, (1914), 1101 states have internal predecessors, (1914), 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 01:48:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1914 transitions. [2021-11-07 01:48:55,942 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1914 transitions. Word has length 70 [2021-11-07 01:48:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:55,943 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1914 transitions. [2021-11-07 01:48:55,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1914 transitions. [2021-11-07 01:48:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:48:55,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:55,946 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] [2021-11-07 01:48:55,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:56,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:56,165 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:56,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2053916593, now seen corresponding path program 1 times [2021-11-07 01:48:56,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:56,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135050398] [2021-11-07 01:48:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:56,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:56,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:56,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:48:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:56,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:56,851 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 01:48:56,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:57,025 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 01:48:57,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:57,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135050398] [2021-11-07 01:48:57,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135050398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:57,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:57,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:57,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639283476] [2021-11-07 01:48:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:57,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:57,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:57,027 INFO L87 Difference]: Start difference. First operand 1102 states and 1914 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:57,247 INFO L93 Difference]: Finished difference Result 2997 states and 5207 transitions. [2021-11-07 01:48:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:48:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:57,270 INFO L225 Difference]: With dead ends: 2997 [2021-11-07 01:48:57,273 INFO L226 Difference]: Without dead ends: 2178 [2021-11-07 01:48:57,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 01:48:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-11-07 01:48:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1359. [2021-11-07 01:48:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1353 states have (on average 1.7642276422764227) internal successors, (2387), 1358 states have internal predecessors, (2387), 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 01:48:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2387 transitions. [2021-11-07 01:48:57,420 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2387 transitions. Word has length 72 [2021-11-07 01:48:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:57,421 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 2387 transitions. [2021-11-07 01:48:57,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2387 transitions. [2021-11-07 01:48:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:48:57,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:57,429 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 01:48:57,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:57,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -799933824, now seen corresponding path program 1 times [2021-11-07 01:48:57,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:57,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135516871] [2021-11-07 01:48:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:57,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:57,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:57,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:48:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:58,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:58,418 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 01:48:58,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:58,623 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 01:48:58,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:58,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135516871] [2021-11-07 01:48:58,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135516871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:58,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:58,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:58,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012925773] [2021-11-07 01:48:58,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:58,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:58,625 INFO L87 Difference]: Start difference. First operand 1359 states and 2387 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 01:48:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:58,855 INFO L93 Difference]: Finished difference Result 3658 states and 6427 transitions. [2021-11-07 01:48:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:58,856 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 01:48:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:58,873 INFO L225 Difference]: With dead ends: 3658 [2021-11-07 01:48:58,874 INFO L226 Difference]: Without dead ends: 2383 [2021-11-07 01:48:58,877 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 01:48:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-11-07 01:48:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1564. [2021-11-07 01:48:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1558 states have (on average 1.7734274711168165) internal successors, (2763), 1563 states have internal predecessors, (2763), 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 01:48:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2763 transitions. [2021-11-07 01:48:59,011 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2763 transitions. Word has length 84 [2021-11-07 01:48:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:59,012 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2763 transitions. [2021-11-07 01:48:59,012 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 01:48:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2763 transitions. [2021-11-07 01:48:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:48:59,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:59,016 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 01:48:59,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:59,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,231 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1534742529, now seen corresponding path program 1 times [2021-11-07 01:48:59,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:59,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322701620] [2021-11-07 01:48:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:59,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:59,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:59,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:48:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:00,079 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 01:49:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:00,305 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 01:49:00,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:00,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322701620] [2021-11-07 01:49:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322701620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:00,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:00,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:00,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475563106] [2021-11-07 01:49:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:00,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:00,308 INFO L87 Difference]: Start difference. First operand 1564 states and 2763 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 01:49:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:00,546 INFO L93 Difference]: Finished difference Result 4305 states and 7620 transitions. [2021-11-07 01:49:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:00,546 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 01:49:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:00,568 INFO L225 Difference]: With dead ends: 4305 [2021-11-07 01:49:00,568 INFO L226 Difference]: Without dead ends: 2833 [2021-11-07 01:49:00,572 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 01:49:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-11-07 01:49:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2014. [2021-11-07 01:49:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2008 states have (on average 1.7883466135458168) internal successors, (3591), 2013 states have internal predecessors, (3591), 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 01:49:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 3591 transitions. [2021-11-07 01:49:00,743 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 3591 transitions. Word has length 85 [2021-11-07 01:49:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:00,743 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 3591 transitions. [2021-11-07 01:49:00,743 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 01:49:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 3591 transitions. [2021-11-07 01:49:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:49:00,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:00,748 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 01:49:00,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:00,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1099671790, now seen corresponding path program 1 times [2021-11-07 01:49:00,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:00,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458177699] [2021-11-07 01:49:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:00,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:00,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:01,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:01,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:01,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:01,810 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 01:49:01,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:02,039 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 01:49:02,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:02,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458177699] [2021-11-07 01:49:02,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458177699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:02,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:02,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:02,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120615009] [2021-11-07 01:49:02,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:02,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:02,042 INFO L87 Difference]: Start difference. First operand 2014 states and 3591 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 01:49:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:02,318 INFO L93 Difference]: Finished difference Result 5635 states and 10073 transitions. [2021-11-07 01:49:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:02,318 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 01:49:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:02,364 INFO L225 Difference]: With dead ends: 5635 [2021-11-07 01:49:02,364 INFO L226 Difference]: Without dead ends: 3721 [2021-11-07 01:49:02,367 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 01:49:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-11-07 01:49:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 2902. [2021-11-07 01:49:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2896 states have (on average 1.8045580110497237) internal successors, (5226), 2901 states have internal predecessors, (5226), 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 01:49:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 5226 transitions. [2021-11-07 01:49:02,600 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 5226 transitions. Word has length 86 [2021-11-07 01:49:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:02,601 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 5226 transitions. [2021-11-07 01:49:02,601 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 01:49:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 5226 transitions. [2021-11-07 01:49:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:49:02,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:02,608 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 01:49:02,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:02,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:02,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1037527442, now seen corresponding path program 1 times [2021-11-07 01:49:02,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:02,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441472006] [2021-11-07 01:49:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:02,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:02,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:02,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:49:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:03,761 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 01:49:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:03,985 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 01:49:03,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:03,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441472006] [2021-11-07 01:49:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441472006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:03,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:03,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097627810] [2021-11-07 01:49:03,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:03,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:03,989 INFO L87 Difference]: Start difference. First operand 2902 states and 5226 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 01:49:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:04,311 INFO L93 Difference]: Finished difference Result 8035 states and 14497 transitions. [2021-11-07 01:49:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:04,312 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 01:49:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:04,326 INFO L225 Difference]: With dead ends: 8035 [2021-11-07 01:49:04,326 INFO L226 Difference]: Without dead ends: 5267 [2021-11-07 01:49:04,331 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 01:49:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-11-07 01:49:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 4448. [2021-11-07 01:49:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4442 states have (on average 1.8169743358847366) internal successors, (8071), 4447 states have internal predecessors, (8071), 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 01:49:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 8071 transitions. [2021-11-07 01:49:04,652 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 8071 transitions. Word has length 87 [2021-11-07 01:49:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:04,652 INFO L470 AbstractCegarLoop]: Abstraction has 4448 states and 8071 transitions. [2021-11-07 01:49:04,653 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 01:49:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 8071 transitions. [2021-11-07 01:49:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:49:04,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:04,665 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 01:49:04,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:04,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,878 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1634910847, now seen corresponding path program 1 times [2021-11-07 01:49:04,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:04,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142319499] [2021-11-07 01:49:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:04,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:04,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:04,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:49:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:05,793 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 01:49:05,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:06,017 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 01:49:06,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:06,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142319499] [2021-11-07 01:49:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142319499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:06,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836790870] [2021-11-07 01:49:06,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:06,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:06,020 INFO L87 Difference]: Start difference. First operand 4448 states and 8071 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 01:49:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:06,463 INFO L93 Difference]: Finished difference Result 12389 states and 22515 transitions. [2021-11-07 01:49:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:06,464 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 01:49:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:06,488 INFO L225 Difference]: With dead ends: 12389 [2021-11-07 01:49:06,488 INFO L226 Difference]: Without dead ends: 8109 [2021-11-07 01:49:06,495 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 01:49:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8109 states. [2021-11-07 01:49:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8109 to 7290. [2021-11-07 01:49:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7290 states, 7284 states have (on average 1.8253706754530479) internal successors, (13296), 7289 states have internal predecessors, (13296), 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 01:49:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7290 states to 7290 states and 13296 transitions. [2021-11-07 01:49:06,998 INFO L78 Accepts]: Start accepts. Automaton has 7290 states and 13296 transitions. Word has length 88 [2021-11-07 01:49:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 7290 states and 13296 transitions. [2021-11-07 01:49:07,001 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 01:49:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7290 states and 13296 transitions. [2021-11-07 01:49:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:49:07,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:07,014 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 01:49:07,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:07,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 386481441, now seen corresponding path program 1 times [2021-11-07 01:49:07,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:07,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756935399] [2021-11-07 01:49:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:07,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:07,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:07,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:49:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:08,109 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 01:49:08,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:08,319 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 01:49:08,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:08,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756935399] [2021-11-07 01:49:08,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756935399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:08,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:08,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680082287] [2021-11-07 01:49:08,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:08,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:08,321 INFO L87 Difference]: Start difference. First operand 7290 states and 13296 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 01:49:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:09,124 INFO L93 Difference]: Finished difference Result 21373 states and 39032 transitions. [2021-11-07 01:49:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:09,124 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 01:49:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:09,167 INFO L225 Difference]: With dead ends: 21373 [2021-11-07 01:49:09,167 INFO L226 Difference]: Without dead ends: 14255 [2021-11-07 01:49:09,179 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 01:49:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-11-07 01:49:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 13436. [2021-11-07 01:49:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13430 states have (on average 1.8300074460163813) internal successors, (24577), 13435 states have internal predecessors, (24577), 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 01:49:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 24577 transitions. [2021-11-07 01:49:10,029 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 24577 transitions. Word has length 89 [2021-11-07 01:49:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 13436 states and 24577 transitions. [2021-11-07 01:49:10,030 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 01:49:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 24577 transitions. [2021-11-07 01:49:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:49:10,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:10,052 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, 1, 1, 1] [2021-11-07 01:49:10,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:10,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:10,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash -501938927, now seen corresponding path program 1 times [2021-11-07 01:49:10,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184740797] [2021-11-07 01:49:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:10,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:10,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:49:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:11,240 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 01:49:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:11,561 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 01:49:11,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:11,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184740797] [2021-11-07 01:49:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184740797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:11,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:11,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:11,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420344577] [2021-11-07 01:49:11,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:11,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:11,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:11,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:11,564 INFO L87 Difference]: Start difference. First operand 13436 states and 24577 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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 01:49:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:15,114 INFO L93 Difference]: Finished difference Result 33477 states and 61222 transitions. [2021-11-07 01:49:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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 90 [2021-11-07 01:49:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:15,171 INFO L225 Difference]: With dead ends: 33477 [2021-11-07 01:49:15,171 INFO L226 Difference]: Without dead ends: 20334 [2021-11-07 01:49:15,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 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 01:49:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20334 states. [2021-11-07 01:49:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20334 to 13403. [2021-11-07 01:49:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13403 states, 13397 states have (on average 1.8246622378144361) internal successors, (24445), 13402 states have internal predecessors, (24445), 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 01:49:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13403 states to 13403 states and 24445 transitions. [2021-11-07 01:49:16,042 INFO L78 Accepts]: Start accepts. Automaton has 13403 states and 24445 transitions. Word has length 90 [2021-11-07 01:49:16,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 13403 states and 24445 transitions. [2021-11-07 01:49:16,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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 01:49:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 13403 states and 24445 transitions. [2021-11-07 01:49:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:49:16,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:16,062 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, 1] [2021-11-07 01:49:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:16,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:16,278 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1685263886, now seen corresponding path program 1 times [2021-11-07 01:49:16,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:16,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500979209] [2021-11-07 01:49:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:16,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:16,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:16,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:16,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:49:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:17,407 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 01:49:17,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:17,668 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 01:49:17,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:17,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500979209] [2021-11-07 01:49:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500979209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:17,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:17,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:17,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166807947] [2021-11-07 01:49:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:17,670 INFO L87 Difference]: Start difference. First operand 13403 states and 24445 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 01:49:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:18,844 INFO L93 Difference]: Finished difference Result 39416 states and 71962 transitions. [2021-11-07 01:49:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2021-11-07 01:49:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:18,932 INFO L225 Difference]: With dead ends: 39416 [2021-11-07 01:49:18,932 INFO L226 Difference]: Without dead ends: 26192 [2021-11-07 01:49:18,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 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 01:49:18,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-11-07 01:49:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 25373. [2021-11-07 01:49:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25373 states, 25367 states have (on average 1.8265463003114282) internal successors, (46334), 25372 states have internal predecessors, (46334), 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 01:49:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25373 states to 25373 states and 46334 transitions. [2021-11-07 01:49:20,302 INFO L78 Accepts]: Start accepts. Automaton has 25373 states and 46334 transitions. Word has length 90 [2021-11-07 01:49:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:20,302 INFO L470 AbstractCegarLoop]: Abstraction has 25373 states and 46334 transitions. [2021-11-07 01:49:20,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 01:49:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25373 states and 46334 transitions. [2021-11-07 01:49:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:49:20,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:20,326 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, 1, 1] [2021-11-07 01:49:20,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:20,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:20,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2019605857, now seen corresponding path program 1 times [2021-11-07 01:49:20,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:20,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026200863] [2021-11-07 01:49:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:20,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:20,544 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:20,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:49:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:21,555 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 01:49:21,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:21,785 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 01:49:21,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:21,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026200863] [2021-11-07 01:49:21,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026200863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:21,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:21,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:21,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223505570] [2021-11-07 01:49:21,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:21,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:21,791 INFO L87 Difference]: Start difference. First operand 25373 states and 46334 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 01:49:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:23,537 INFO L93 Difference]: Finished difference Result 69965 states and 127365 transitions. [2021-11-07 01:49:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-07 01:49:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:23,650 INFO L225 Difference]: With dead ends: 69965 [2021-11-07 01:49:23,651 INFO L226 Difference]: Without dead ends: 44818 [2021-11-07 01:49:23,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 01:49:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44818 states. [2021-11-07 01:49:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44818 to 43999. [2021-11-07 01:49:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43999 states, 43993 states have (on average 1.815538835723865) internal successors, (79871), 43998 states have internal predecessors, (79871), 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 01:49:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43999 states to 43999 states and 79871 transitions. [2021-11-07 01:49:26,119 INFO L78 Accepts]: Start accepts. Automaton has 43999 states and 79871 transitions. Word has length 91 [2021-11-07 01:49:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:26,120 INFO L470 AbstractCegarLoop]: Abstraction has 43999 states and 79871 transitions. [2021-11-07 01:49:26,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 01:49:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43999 states and 79871 transitions. [2021-11-07 01:49:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:49:26,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:26,148 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:26,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:49:26,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,365 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:26,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2109496309, now seen corresponding path program 1 times [2021-11-07 01:49:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:26,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058528026] [2021-11-07 01:49:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:26,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:26,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:26,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:49:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:27,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:27,555 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 01:49:27,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:27,832 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 01:49:27,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:27,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058528026] [2021-11-07 01:49:27,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058528026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:27,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:27,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:27,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700081869] [2021-11-07 01:49:27,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:27,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:27,834 INFO L87 Difference]: Start difference. First operand 43999 states and 79871 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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 01:49:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:35,256 INFO L93 Difference]: Finished difference Result 171276 states and 310806 transitions. [2021-11-07 01:49:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:49:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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 92 [2021-11-07 01:49:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:35,557 INFO L225 Difference]: With dead ends: 171276 [2021-11-07 01:49:35,557 INFO L226 Difference]: Without dead ends: 127569 [2021-11-07 01:49:35,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 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 01:49:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127569 states. [2021-11-07 01:49:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127569 to 43741. [2021-11-07 01:49:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43741 states, 43735 states have (on average 1.8026523379444381) internal successors, (78839), 43740 states have internal predecessors, (78839), 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 01:49:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43741 states to 43741 states and 78839 transitions. [2021-11-07 01:49:38,929 INFO L78 Accepts]: Start accepts. Automaton has 43741 states and 78839 transitions. Word has length 92 [2021-11-07 01:49:38,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:38,930 INFO L470 AbstractCegarLoop]: Abstraction has 43741 states and 78839 transitions. [2021-11-07 01:49:38,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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 01:49:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 43741 states and 78839 transitions. [2021-11-07 01:49:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:49:38,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:38,950 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, 1, 1, 1] [2021-11-07 01:49:38,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:39,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,165 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1079803437, now seen corresponding path program 1 times [2021-11-07 01:49:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:39,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504860178] [2021-11-07 01:49:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:39,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:39,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:39,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:49:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:40,219 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 01:49:40,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:40,429 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 01:49:40,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:40,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504860178] [2021-11-07 01:49:40,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504860178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:40,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:40,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294260796] [2021-11-07 01:49:40,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:40,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:40,431 INFO L87 Difference]: Start difference. First operand 43741 states and 78839 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 01:49:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:42,705 INFO L93 Difference]: Finished difference Result 88003 states and 158585 transitions. [2021-11-07 01:49:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 92 [2021-11-07 01:49:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:42,777 INFO L225 Difference]: With dead ends: 88003 [2021-11-07 01:49:42,777 INFO L226 Difference]: Without dead ends: 44560 [2021-11-07 01:49:42,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 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 01:49:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44560 states. [2021-11-07 01:49:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44560 to 43741. [2021-11-07 01:49:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43741 states, 43735 states have (on average 1.7997256202126444) internal successors, (78711), 43740 states have internal predecessors, (78711), 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 01:49:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43741 states to 43741 states and 78711 transitions. [2021-11-07 01:49:45,054 INFO L78 Accepts]: Start accepts. Automaton has 43741 states and 78711 transitions. Word has length 92 [2021-11-07 01:49:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:45,055 INFO L470 AbstractCegarLoop]: Abstraction has 43741 states and 78711 transitions. [2021-11-07 01:49:45,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 01:49:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43741 states and 78711 transitions. [2021-11-07 01:49:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:49:45,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:45,072 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, 1, 1, 1] [2021-11-07 01:49:45,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:45,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,289 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:49:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 626638816, now seen corresponding path program 1 times [2021-11-07 01:49:45,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511105084] [2021-11-07 01:49:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:45,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:45,291 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:45,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7398ee-418c-44fc-86ec-30318b83e4de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:49:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:46,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:46,415 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 01:49:46,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:46,618 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 01:49:46,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:46,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511105084] [2021-11-07 01:49:46,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511105084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:46,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:46,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:46,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468372320] [2021-11-07 01:49:46,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:46,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:46,623 INFO L87 Difference]: Start difference. First operand 43741 states and 78711 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 01:49:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,291 INFO L93 Difference]: Finished difference Result 122733 states and 220611 transitions. [2021-11-07 01:49:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2021-11-07 01:49:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,420 INFO L225 Difference]: With dead ends: 122733 [2021-11-07 01:49:50,420 INFO L226 Difference]: Without dead ends: 79250 [2021-11-07 01:49:50,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 01:49:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79250 states.