./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.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_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/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_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/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_4dfbb591-f018-4c0e-9a94-54393c546435/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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:01:43,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:01:43,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:01:43,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:01:43,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:01:43,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:01:43,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:01:43,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:01:43,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:01:43,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:01:43,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:01:43,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:01:43,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:01:43,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:01:43,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:01:43,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:01:43,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:01:43,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:01:43,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:01:43,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:01:43,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:01:43,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:01:43,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:01:43,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:01:43,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:01:43,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:01:43,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:01:43,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:01:43,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:01:43,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:01:43,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:01:43,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:01:43,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:01:43,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:01:43,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:01:43,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:01:43,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:01:43,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:01:43,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:01:43,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:01:43,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:01:43,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:01:43,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:01:43,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:01:43,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:01:43,960 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:01:43,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:01:43,961 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:01:43,961 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:01:43,961 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:01:43,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:01:43,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:01:43,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:01:43,972 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:01:43,972 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:01:43,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:01:43,973 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:01:43,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:01:43,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:01:43,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:01:43,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:01:43,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:01:43,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:01:43,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:01:43,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:01:43,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:01:43,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:01:43,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:01:43,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:01:43,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:01:43,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:01:43,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:01:43,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:43,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:01:43,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:01:43,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:01:43,982 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:01:43,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:01:43,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:01:43,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:01:43,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:01:43,984 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_4dfbb591-f018-4c0e-9a94-54393c546435/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2021-11-07 02:01:44,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:01:44,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:01:44,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:01:44,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:01:44,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:01:44,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-07 02:01:44,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/6a8aedda7/cd34811ca9cf4bba991e83579f3d4947/FLAGe473b1523 [2021-11-07 02:01:45,396 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:01:45,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-07 02:01:45,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/6a8aedda7/cd34811ca9cf4bba991e83579f3d4947/FLAGe473b1523 [2021-11-07 02:01:45,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/6a8aedda7/cd34811ca9cf4bba991e83579f3d4947 [2021-11-07 02:01:45,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:01:45,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:01:45,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:45,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:01:45,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:01:45,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:45" (1/1) ... [2021-11-07 02:01:45,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3a87bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:45, skipping insertion in model container [2021-11-07 02:01:45,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:45" (1/1) ... [2021-11-07 02:01:45,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:01:45,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:46,548 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_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-07 02:01:46,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:46,648 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:01:46,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f38fe25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:46, skipping insertion in model container [2021-11-07 02:01:46,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:46,649 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:01:46,653 INFO L168 Benchmark]: Toolchain (without parser) took 1099.77 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 81.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:01:46,654 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 93.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:01:46,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1092.47 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 81.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:01:46,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 93.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1092.47 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 81.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3206]: 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_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/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_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/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_4dfbb591-f018-4c0e-9a94-54393c546435/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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:01:49,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:01:49,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:01:49,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:01:49,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:01:49,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:01:49,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:01:49,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:01:49,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:01:49,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:01:49,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:01:49,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:01:49,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:01:49,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:01:49,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:01:49,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:01:49,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:01:49,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:01:49,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:01:49,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:01:49,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:01:49,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:01:49,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:01:49,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:01:49,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:01:49,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:01:49,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:01:49,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:01:49,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:01:49,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:01:49,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:01:49,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:01:49,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:01:49,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:01:49,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:01:49,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:01:49,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:01:49,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:01:49,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:01:49,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:01:49,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:01:49,575 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:01:49,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:01:49,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:01:49,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:01:49,637 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:01:49,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:01:49,638 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:01:49,638 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:01:49,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:01:49,639 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:01:49,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:01:49,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:01:49,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:01:49,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:01:49,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:01:49,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:01:49,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:01:49,644 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:01:49,644 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:01:49,645 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:01:49,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:01:49,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:01:49,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:01:49,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:01:49,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:01:49,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:01:49,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:01:49,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:49,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:01:49,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:01:49,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:01:49,648 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:01:49,648 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:01:49,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:01:49,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:01:49,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:01:49,650 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_4dfbb591-f018-4c0e-9a94-54393c546435/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2021-11-07 02:01:50,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:01:50,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:01:50,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:01:50,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:01:50,120 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:01:50,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-07 02:01:50,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/ba6ef5ef3/7f0d493b5a474ff59563a7aaf4f1022e/FLAG9b9fab23c [2021-11-07 02:01:51,182 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:01:51,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-07 02:01:51,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/ba6ef5ef3/7f0d493b5a474ff59563a7aaf4f1022e/FLAG9b9fab23c [2021-11-07 02:01:51,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/data/ba6ef5ef3/7f0d493b5a474ff59563a7aaf4f1022e [2021-11-07 02:01:51,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:01:51,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:01:51,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:51,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:01:51,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:01:51,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:51" (1/1) ... [2021-11-07 02:01:51,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a1ab9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:51, skipping insertion in model container [2021-11-07 02:01:51,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:01:51" (1/1) ... [2021-11-07 02:01:51,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:01:51,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:52,017 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_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-07 02:01:52,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:52,129 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:01:52,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:01:52,328 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_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-07 02:01:52,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:52,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:01:52,470 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_4dfbb591-f018-4c0e-9a94-54393c546435/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-07 02:01:52,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:01:52,539 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:01:52,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52 WrapperNode [2021-11-07 02:01:52,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:01:52,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:52,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:01:52,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:01:52,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:52,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:01:53,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:01:53,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:01:53,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:01:53,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:53,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:54,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:54,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:01:54,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:01:54,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:01:54,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:01:54,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (1/1) ... [2021-11-07 02:01:54,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:01:54,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:01:54,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:01:54,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:01:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:01:54,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:01:54,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:01:54,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:02:14,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:02:14,588 INFO L299 CfgBuilder]: Removed 1613 assume(true) statements. [2021-11-07 02:02:14,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:14 BoogieIcfgContainer [2021-11-07 02:02:14,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:02:14,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:02:14,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:02:14,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:02:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:01:51" (1/3) ... [2021-11-07 02:02:14,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d4d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:14, skipping insertion in model container [2021-11-07 02:02:14,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:01:52" (2/3) ... [2021-11-07 02:02:14,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562d4d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:14, skipping insertion in model container [2021-11-07 02:02:14,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:14" (3/3) ... [2021-11-07 02:02:14,610 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2021-11-07 02:02:14,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:02:14,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:02:14,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:02:14,718 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:02:14,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:02:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 6972 states, 6966 states have (on average 1.8910422049956934) internal successors, (13173), 6971 states have internal predecessors, (13173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:14,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:02:14,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:14,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:14,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash 100278991, now seen corresponding path program 1 times [2021-11-07 02:02:14,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:14,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501901938] [2021-11-07 02:02:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:14,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:14,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:14,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:02:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:02:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:15,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:15,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501901938] [2021-11-07 02:02:15,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501901938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:15,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:15,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123680498] [2021-11-07 02:02:15,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:02:15,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:02:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:02:15,751 INFO L87 Difference]: Start difference. First operand has 6972 states, 6966 states have (on average 1.8910422049956934) internal successors, (13173), 6971 states have internal predecessors, (13173), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:16,041 INFO L93 Difference]: Finished difference Result 6991 states and 13196 transitions. [2021-11-07 02:02:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:02:16,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:02:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:16,121 INFO L225 Difference]: With dead ends: 6991 [2021-11-07 02:02:16,121 INFO L226 Difference]: Without dead ends: 6968 [2021-11-07 02:02:16,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 02:02:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2021-11-07 02:02:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6968. [2021-11-07 02:02:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6963 states have (on average 1.8901335631193452) internal successors, (13161), 6967 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 13161 transitions. [2021-11-07 02:02:16,465 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 13161 transitions. Word has length 27 [2021-11-07 02:02:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:16,466 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 13161 transitions. [2021-11-07 02:02:16,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 13161 transitions. [2021-11-07 02:02:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:02:16,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:16,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:16,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:16,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:16,693 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1157355953, now seen corresponding path program 1 times [2021-11-07 02:02:16,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:16,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022592265] [2021-11-07 02:02:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:16,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:16,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:16,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:16,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:02:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:02:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:17,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:17,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:17,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022592265] [2021-11-07 02:02:17,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022592265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:17,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:17,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:17,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668117288] [2021-11-07 02:02:17,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:17,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:17,307 INFO L87 Difference]: Start difference. First operand 6968 states and 13161 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:17,783 INFO L93 Difference]: Finished difference Result 13923 states and 26303 transitions. [2021-11-07 02:02:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:02:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:17,842 INFO L225 Difference]: With dead ends: 13923 [2021-11-07 02:02:17,842 INFO L226 Difference]: Without dead ends: 6968 [2021-11-07 02:02:17,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6968 states. [2021-11-07 02:02:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6968 to 6968. [2021-11-07 02:02:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6963 states have (on average 1.889271865575183) internal successors, (13155), 6967 states have internal predecessors, (13155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 13155 transitions. [2021-11-07 02:02:18,325 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 13155 transitions. Word has length 29 [2021-11-07 02:02:18,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:18,326 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 13155 transitions. [2021-11-07 02:02:18,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 13155 transitions. [2021-11-07 02:02:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:02:18,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:18,330 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] [2021-11-07 02:02:18,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:18,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:18,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1275802363, now seen corresponding path program 1 times [2021-11-07 02:02:18,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:18,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018533955] [2021-11-07 02:02:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:18,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:18,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:18,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:02:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:18,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:02:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:19,079 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 02:02:19,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:19,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:19,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018533955] [2021-11-07 02:02:19,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018533955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:19,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:19,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:02:19,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648876386] [2021-11-07 02:02:19,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:19,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:19,227 INFO L87 Difference]: Start difference. First operand 6968 states and 13155 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:20,040 INFO L93 Difference]: Finished difference Result 13887 states and 26226 transitions. [2021-11-07 02:02:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 02:02:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:20,192 INFO L225 Difference]: With dead ends: 13887 [2021-11-07 02:02:20,192 INFO L226 Difference]: Without dead ends: 6941 [2021-11-07 02:02:20,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2021-11-07 02:02:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2021-11-07 02:02:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6936 states have (on average 1.8885524798154556) internal successors, (13099), 6940 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13099 transitions. [2021-11-07 02:02:20,622 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13099 transitions. Word has length 34 [2021-11-07 02:02:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 13099 transitions. [2021-11-07 02:02:20,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13099 transitions. [2021-11-07 02:02:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:02:20,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:20,627 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] [2021-11-07 02:02:20,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:20,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:20,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:20,844 INFO L85 PathProgramCache]: Analyzing trace with hash -234979549, now seen corresponding path program 1 times [2021-11-07 02:02:20,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:20,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303457941] [2021-11-07 02:02:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:20,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:20,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:20,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:20,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:02:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:02:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:21,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:21,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:21,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303457941] [2021-11-07 02:02:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303457941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:21,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:21,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:21,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100282943] [2021-11-07 02:02:21,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:21,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:21,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:21,571 INFO L87 Difference]: Start difference. First operand 6941 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:22,257 INFO L93 Difference]: Finished difference Result 13860 states and 26170 transitions. [2021-11-07 02:02:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:02:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:22,311 INFO L225 Difference]: With dead ends: 13860 [2021-11-07 02:02:22,311 INFO L226 Difference]: Without dead ends: 6941 [2021-11-07 02:02:22,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2021-11-07 02:02:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 6941. [2021-11-07 02:02:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6936 states have (on average 1.8876874279123415) internal successors, (13093), 6940 states have internal predecessors, (13093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 13093 transitions. [2021-11-07 02:02:22,684 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 13093 transitions. Word has length 35 [2021-11-07 02:02:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:22,685 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 13093 transitions. [2021-11-07 02:02:22,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 13093 transitions. [2021-11-07 02:02:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:02:22,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:22,689 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] [2021-11-07 02:02:22,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:22,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:22,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash -420164622, now seen corresponding path program 1 times [2021-11-07 02:02:22,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:22,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028462986] [2021-11-07 02:02:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:22,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:22,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:22,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:02:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:02:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:23,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:23,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:23,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028462986] [2021-11-07 02:02:23,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028462986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:23,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:23,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:02:23,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182896449] [2021-11-07 02:02:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:23,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:23,746 INFO L87 Difference]: Start difference. First operand 6941 states and 13093 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:24,370 INFO L93 Difference]: Finished difference Result 13854 states and 26153 transitions. [2021-11-07 02:02:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 40 [2021-11-07 02:02:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:24,394 INFO L225 Difference]: With dead ends: 13854 [2021-11-07 02:02:24,395 INFO L226 Difference]: Without dead ends: 6938 [2021-11-07 02:02:24,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:02:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2021-11-07 02:02:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 6938. [2021-11-07 02:02:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6938 states, 6933 states have (on average 1.8873503533823741) internal successors, (13085), 6937 states have internal predecessors, (13085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6938 states to 6938 states and 13085 transitions. [2021-11-07 02:02:24,759 INFO L78 Accepts]: Start accepts. Automaton has 6938 states and 13085 transitions. Word has length 40 [2021-11-07 02:02:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 6938 states and 13085 transitions. [2021-11-07 02:02:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6938 states and 13085 transitions. [2021-11-07 02:02:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:02:24,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:24,763 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] [2021-11-07 02:02:24,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:24,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:24,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2034086878, now seen corresponding path program 1 times [2021-11-07 02:02:24,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:24,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449802617] [2021-11-07 02:02:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:24,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:24,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:24,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:25,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:02:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:02:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:25,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:26,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:26,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449802617] [2021-11-07 02:02:26,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449802617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:26,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:02:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357191738] [2021-11-07 02:02:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:26,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:26,037 INFO L87 Difference]: Start difference. First operand 6938 states and 13085 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:27,823 INFO L93 Difference]: Finished difference Result 18164 states and 34300 transitions. [2021-11-07 02:02:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:27,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:02:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:27,886 INFO L225 Difference]: With dead ends: 18164 [2021-11-07 02:02:27,886 INFO L226 Difference]: Without dead ends: 14653 [2021-11-07 02:02:27,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14653 states. [2021-11-07 02:02:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14653 to 9080. [2021-11-07 02:02:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9075 states have (on average 1.887823691460055) internal successors, (17132), 9079 states have internal predecessors, (17132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 17132 transitions. [2021-11-07 02:02:28,588 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 17132 transitions. Word has length 41 [2021-11-07 02:02:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:28,588 INFO L470 AbstractCegarLoop]: Abstraction has 9080 states and 17132 transitions. [2021-11-07 02:02:28,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 17132 transitions. [2021-11-07 02:02:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:02:28,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:28,596 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] [2021-11-07 02:02:28,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:28,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:28,810 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2082230644, now seen corresponding path program 1 times [2021-11-07 02:02:28,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:28,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352656058] [2021-11-07 02:02:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:28,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:28,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:28,815 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:28,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:02:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:29,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:29,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:29,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:29,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352656058] [2021-11-07 02:02:29,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352656058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:29,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:29,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:02:29,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489157303] [2021-11-07 02:02:29,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:29,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:29,956 INFO L87 Difference]: Start difference. First operand 9080 states and 17132 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 02:02:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:30,963 INFO L93 Difference]: Finished difference Result 17020 states and 31902 transitions. [2021-11-07 02:02:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:02:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 60 [2021-11-07 02:02:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:30,999 INFO L225 Difference]: With dead ends: 17020 [2021-11-07 02:02:30,999 INFO L226 Difference]: Without dead ends: 9149 [2021-11-07 02:02:31,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:02:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9149 states. [2021-11-07 02:02:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9149 to 6369. [2021-11-07 02:02:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6364 states have (on average 1.8812067881835324) internal successors, (11972), 6368 states have internal predecessors, (11972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 11972 transitions. [2021-11-07 02:02:31,616 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 11972 transitions. Word has length 60 [2021-11-07 02:02:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:31,617 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 11972 transitions. [2021-11-07 02:02:31,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 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 02:02:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 11972 transitions. [2021-11-07 02:02:31,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:02:31,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:31,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:31,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:31,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:31,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1389818566, now seen corresponding path program 1 times [2021-11-07 02:02:31,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:31,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352074696] [2021-11-07 02:02:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:31,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:31,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:31,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:02:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:32,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:33,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:33,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352074696] [2021-11-07 02:02:33,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352074696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:33,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:33,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:02:33,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619275549] [2021-11-07 02:02:33,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:33,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:33,024 INFO L87 Difference]: Start difference. First operand 6369 states and 11972 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 02:02:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:38,729 INFO L93 Difference]: Finished difference Result 22249 states and 41856 transitions. [2021-11-07 02:02:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 61 [2021-11-07 02:02:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:38,790 INFO L225 Difference]: With dead ends: 22249 [2021-11-07 02:02:38,790 INFO L226 Difference]: Without dead ends: 15914 [2021-11-07 02:02:38,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 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 02:02:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15914 states. [2021-11-07 02:02:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15914 to 6369. [2021-11-07 02:02:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6364 states have (on average 1.8243243243243243) internal successors, (11610), 6368 states have internal predecessors, (11610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 11610 transitions. [2021-11-07 02:02:39,367 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 11610 transitions. Word has length 61 [2021-11-07 02:02:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:39,368 INFO L470 AbstractCegarLoop]: Abstraction has 6369 states and 11610 transitions. [2021-11-07 02:02:39,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 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 02:02:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 11610 transitions. [2021-11-07 02:02:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:02:39,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:39,373 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 02:02:39,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:39,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:39,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1768436262, now seen corresponding path program 1 times [2021-11-07 02:02:39,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:39,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640190166] [2021-11-07 02:02:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:39,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:39,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:39,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:39,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:02:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:40,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:40,773 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 02:02:40,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:40,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640190166] [2021-11-07 02:02:40,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640190166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:40,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:40,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:02:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314805772] [2021-11-07 02:02:40,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:40,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:40,777 INFO L87 Difference]: Start difference. First operand 6369 states and 11610 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:44,165 INFO L93 Difference]: Finished difference Result 17423 states and 32048 transitions. [2021-11-07 02:02:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:02:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:02:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:44,199 INFO L225 Difference]: With dead ends: 17423 [2021-11-07 02:02:44,199 INFO L226 Difference]: Without dead ends: 11115 [2021-11-07 02:02:44,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:02:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11115 states. [2021-11-07 02:02:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11115 to 6265. [2021-11-07 02:02:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6265 states, 6260 states have (on average 1.8252396166134186) internal successors, (11426), 6264 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6265 states to 6265 states and 11426 transitions. [2021-11-07 02:02:44,674 INFO L78 Accepts]: Start accepts. Automaton has 6265 states and 11426 transitions. Word has length 69 [2021-11-07 02:02:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:44,675 INFO L470 AbstractCegarLoop]: Abstraction has 6265 states and 11426 transitions. [2021-11-07 02:02:44,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 6265 states and 11426 transitions. [2021-11-07 02:02:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:02:44,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:44,679 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 02:02:44,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:44,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:44,892 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1752938839, now seen corresponding path program 1 times [2021-11-07 02:02:44,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:44,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322908434] [2021-11-07 02:02:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:44,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:44,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:44,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:02:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:46,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:47,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322908434] [2021-11-07 02:02:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322908434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:47,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:47,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:02:47,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132207506] [2021-11-07 02:02:47,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:47,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:47,860 INFO L87 Difference]: Start difference. First operand 6265 states and 11426 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:52,006 INFO L93 Difference]: Finished difference Result 19986 states and 36459 transitions. [2021-11-07 02:02:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 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 02:02:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:52,048 INFO L225 Difference]: With dead ends: 19986 [2021-11-07 02:02:52,048 INFO L226 Difference]: Without dead ends: 13774 [2021-11-07 02:02:52,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2021-11-07 02:02:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 8712. [2021-11-07 02:02:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8712 states, 8707 states have (on average 1.8117606523486849) internal successors, (15775), 8711 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8712 states to 8712 states and 15775 transitions. [2021-11-07 02:02:52,740 INFO L78 Accepts]: Start accepts. Automaton has 8712 states and 15775 transitions. Word has length 72 [2021-11-07 02:02:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:52,741 INFO L470 AbstractCegarLoop]: Abstraction has 8712 states and 15775 transitions. [2021-11-07 02:02:52,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8712 states and 15775 transitions. [2021-11-07 02:02:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:02:52,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:52,745 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] [2021-11-07 02:02:52,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:52,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:52,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1417519602, now seen corresponding path program 1 times [2021-11-07 02:02:52,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:52,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873461162] [2021-11-07 02:02:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:52,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:52,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:52,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:02:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:53,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:54,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:54,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873461162] [2021-11-07 02:02:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873461162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:54,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:54,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:02:54,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239404879] [2021-11-07 02:02:54,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:54,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:54,303 INFO L87 Difference]: Start difference. First operand 8712 states and 15775 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 02:03:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:01,119 INFO L93 Difference]: Finished difference Result 34572 states and 63023 transitions. [2021-11-07 02:03:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:03:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 73 [2021-11-07 02:03:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:01,168 INFO L225 Difference]: With dead ends: 34572 [2021-11-07 02:03:01,169 INFO L226 Difference]: Without dead ends: 25912 [2021-11-07 02:03:01,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:03:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25912 states. [2021-11-07 02:03:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25912 to 8726. [2021-11-07 02:03:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 8721 states have (on average 1.8104575163398693) internal successors, (15789), 8725 states have internal predecessors, (15789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 15789 transitions. [2021-11-07 02:03:02,195 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 15789 transitions. Word has length 73 [2021-11-07 02:03:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:02,196 INFO L470 AbstractCegarLoop]: Abstraction has 8726 states and 15789 transitions. [2021-11-07 02:03:02,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 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 02:03:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 15789 transitions. [2021-11-07 02:03:02,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:03:02,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:02,207 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] [2021-11-07 02:03:02,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:02,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,422 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1038663033, now seen corresponding path program 1 times [2021-11-07 02:03:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229576897] [2021-11-07 02:03:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:02,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:02,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:02,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:03:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:03,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:03,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:03,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229576897] [2021-11-07 02:03:03,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229576897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:03,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:03,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:03:03,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764813259] [2021-11-07 02:03:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:03,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:03,608 INFO L87 Difference]: Start difference. First operand 8726 states and 15789 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 02:03:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:13,989 INFO L93 Difference]: Finished difference Result 27004 states and 49224 transitions. [2021-11-07 02:03:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:03:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 74 [2021-11-07 02:03:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:14,019 INFO L225 Difference]: With dead ends: 27004 [2021-11-07 02:03:14,019 INFO L226 Difference]: Without dead ends: 19892 [2021-11-07 02:03:14,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19892 states. [2021-11-07 02:03:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19892 to 15108. [2021-11-07 02:03:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15108 states, 15103 states have (on average 1.8120241011719527) internal successors, (27367), 15107 states have internal predecessors, (27367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15108 states to 15108 states and 27367 transitions. [2021-11-07 02:03:14,929 INFO L78 Accepts]: Start accepts. Automaton has 15108 states and 27367 transitions. Word has length 74 [2021-11-07 02:03:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 15108 states and 27367 transitions. [2021-11-07 02:03:14,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 02:03:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15108 states and 27367 transitions. [2021-11-07 02:03:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:03:14,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:14,936 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] [2021-11-07 02:03:14,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:03:15,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,150 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:15,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2049780283, now seen corresponding path program 1 times [2021-11-07 02:03:15,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:15,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175207327] [2021-11-07 02:03:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:15,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:15,154 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:15,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:03:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:15,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:15,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:16,415 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 02:03:16,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:16,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175207327] [2021-11-07 02:03:16,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175207327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:16,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:16,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:16,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836398831] [2021-11-07 02:03:16,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:16,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:16,418 INFO L87 Difference]: Start difference. First operand 15108 states and 27367 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:22,455 INFO L93 Difference]: Finished difference Result 34088 states and 61987 transitions. [2021-11-07 02:03:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:03:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:22,489 INFO L225 Difference]: With dead ends: 34088 [2021-11-07 02:03:22,489 INFO L226 Difference]: Without dead ends: 20579 [2021-11-07 02:03:22,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20579 states. [2021-11-07 02:03:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20579 to 15625. [2021-11-07 02:03:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15625 states, 15620 states have (on average 1.7846350832266324) internal successors, (27876), 15624 states have internal predecessors, (27876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15625 states to 15625 states and 27876 transitions. [2021-11-07 02:03:23,541 INFO L78 Accepts]: Start accepts. Automaton has 15625 states and 27876 transitions. Word has length 74 [2021-11-07 02:03:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 15625 states and 27876 transitions. [2021-11-07 02:03:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 15625 states and 27876 transitions. [2021-11-07 02:03:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:03:23,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:23,544 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] [2021-11-07 02:03:23,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:23,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:23,745 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash 908094399, now seen corresponding path program 1 times [2021-11-07 02:03:23,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:23,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568884624] [2021-11-07 02:03:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:23,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:23,751 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:23,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:03:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:24,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:24,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:24,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:25,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:25,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568884624] [2021-11-07 02:03:25,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568884624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:25,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:25,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:25,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243108331] [2021-11-07 02:03:25,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:25,085 INFO L87 Difference]: Start difference. First operand 15625 states and 27876 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 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 02:03:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:31,344 INFO L93 Difference]: Finished difference Result 110676 states and 198947 transitions. [2021-11-07 02:03:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:03:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 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 76 [2021-11-07 02:03:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:31,535 INFO L225 Difference]: With dead ends: 110676 [2021-11-07 02:03:31,536 INFO L226 Difference]: Without dead ends: 95099 [2021-11-07 02:03:31,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:03:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95099 states. [2021-11-07 02:03:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95099 to 25177. [2021-11-07 02:03:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25172 states have (on average 1.7934609883998094) internal successors, (45145), 25176 states have internal predecessors, (45145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 45145 transitions. [2021-11-07 02:03:34,042 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 45145 transitions. Word has length 76 [2021-11-07 02:03:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:34,043 INFO L470 AbstractCegarLoop]: Abstraction has 25177 states and 45145 transitions. [2021-11-07 02:03:34,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 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 02:03:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 45145 transitions. [2021-11-07 02:03:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:03:34,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:34,046 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] [2021-11-07 02:03:34,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:34,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,254 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 835707841, now seen corresponding path program 1 times [2021-11-07 02:03:34,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:34,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075576368] [2021-11-07 02:03:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:34,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:34,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:34,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:03:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:03:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:35,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:35,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:35,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075576368] [2021-11-07 02:03:35,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075576368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:35,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:35,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:03:35,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415366026] [2021-11-07 02:03:35,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:35,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:35,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:35,697 INFO L87 Difference]: Start difference. First operand 25177 states and 45145 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 02:03:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:41,049 INFO L93 Difference]: Finished difference Result 61717 states and 111578 transitions. [2021-11-07 02:03:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:03:41,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 76 [2021-11-07 02:03:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:41,117 INFO L225 Difference]: With dead ends: 61717 [2021-11-07 02:03:41,117 INFO L226 Difference]: Without dead ends: 42012 [2021-11-07 02:03:41,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:03:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42012 states. [2021-11-07 02:03:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42012 to 25142. [2021-11-07 02:03:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25142 states, 25137 states have (on average 1.7931734097147631) internal successors, (45075), 25141 states have internal predecessors, (45075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25142 states to 25142 states and 45075 transitions. [2021-11-07 02:03:43,133 INFO L78 Accepts]: Start accepts. Automaton has 25142 states and 45075 transitions. Word has length 76 [2021-11-07 02:03:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 25142 states and 45075 transitions. [2021-11-07 02:03:43,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 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 02:03:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 25142 states and 45075 transitions. [2021-11-07 02:03:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:03:43,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:43,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:43,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:43,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:43,338 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash 696484899, now seen corresponding path program 1 times [2021-11-07 02:03:43,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:43,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904144509] [2021-11-07 02:03:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:43,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:43,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:43,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:03:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:44,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:44,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:44,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904144509] [2021-11-07 02:03:44,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904144509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:44,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:44,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:03:44,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776476642] [2021-11-07 02:03:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:44,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:44,848 INFO L87 Difference]: Start difference. First operand 25142 states and 45075 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:48,188 INFO L93 Difference]: Finished difference Result 67426 states and 121158 transitions. [2021-11-07 02:03:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 02:03:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:48,264 INFO L225 Difference]: With dead ends: 67426 [2021-11-07 02:03:48,264 INFO L226 Difference]: Without dead ends: 44133 [2021-11-07 02:03:48,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44133 states. [2021-11-07 02:03:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44133 to 44118. [2021-11-07 02:03:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44118 states, 44113 states have (on average 1.7990161630358397) internal successors, (79360), 44117 states have internal predecessors, (79360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44118 states to 44118 states and 79360 transitions. [2021-11-07 02:03:51,616 INFO L78 Accepts]: Start accepts. Automaton has 44118 states and 79360 transitions. Word has length 83 [2021-11-07 02:03:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:51,616 INFO L470 AbstractCegarLoop]: Abstraction has 44118 states and 79360 transitions. [2021-11-07 02:03:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44118 states and 79360 transitions. [2021-11-07 02:03:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:03:51,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:51,620 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 02:03:51,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:51,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:51,834 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash -518849714, now seen corresponding path program 1 times [2021-11-07 02:03:51,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:51,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23693613] [2021-11-07 02:03:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:51,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:51,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:51,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dfbb591-f018-4c0e-9a94-54393c546435/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:03:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:52,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:53,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:53,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:53,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23693613] [2021-11-07 02:03:53,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23693613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:53,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:53,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:03:53,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234111210] [2021-11-07 02:03:53,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:53,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:53,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:53,424 INFO L87 Difference]: Start difference. First operand 44118 states and 79360 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:59,118 INFO L93 Difference]: Finished difference Result 123078 states and 221641 transitions. [2021-11-07 02:03:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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 02:03:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:59,292 INFO L225 Difference]: With dead ends: 123078 [2021-11-07 02:03:59,292 INFO L226 Difference]: Without dead ends: 81926 [2021-11-07 02:03:59,331 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 02:03:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81926 states.