./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:02:40,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:02:40,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:02:40,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:02:40,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:02:40,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:02:40,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:02:40,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:02:40,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:02:40,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:02:40,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:02:40,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:02:40,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:02:40,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:02:40,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:02:40,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:02:40,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:02:40,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:02:40,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:02:40,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:02:40,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:02:40,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:02:40,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:02:40,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:02:40,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:02:40,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:02:40,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:02:40,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:02:40,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:02:40,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:02:40,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:02:40,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:02:40,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:02:40,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:02:40,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:02:40,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:02:40,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:02:40,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:02:40,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:02:40,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:02:40,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:02:40,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:02:40,965 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:02:40,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:02:40,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:02:40,974 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:02:40,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:02:40,975 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:02:40,975 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:02:40,975 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:02:40,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:02:40,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:02:40,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:02:40,983 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:02:40,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:02:40,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:02:40,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:02:40,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:02:40,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:02:40,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:02:40,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:02:40,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:02:40,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:02:40,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:02:40,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:02:40,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:02:40,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:02:40,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:02:40,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:02:40,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:02:40,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:02:40,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:02:40,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:40,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:02:40,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:02:40,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:02:40,992 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:02:40,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:02:40,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:02:40,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:02:40,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:02:40,993 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2021-11-03 05:02:41,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:02:41,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:02:41,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:02:41,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:02:41,306 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:02:41,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-03 05:02:41,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/b7fe0dbeb/90009664aa5442e7bee4c7df42acb5a2/FLAG3822252d1 [2021-11-03 05:02:42,004 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:02:42,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-03 05:02:42,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/b7fe0dbeb/90009664aa5442e7bee4c7df42acb5a2/FLAG3822252d1 [2021-11-03 05:02:42,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/b7fe0dbeb/90009664aa5442e7bee4c7df42acb5a2 [2021-11-03 05:02:42,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:02:42,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:02:42,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:42,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:02:42,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:02:42,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:42" (1/1) ... [2021-11-03 05:02:42,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be14fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:42, skipping insertion in model container [2021-11-03 05:02:42,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:42" (1/1) ... [2021-11-03 05:02:42,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:02:42,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:42,900 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-03 05:02:43,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:43,118 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) [2021-11-03 05:02:43,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e9a0dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:43, skipping insertion in model container [2021-11-03 05:02:43,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:43,119 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:02:43,123 INFO L168 Benchmark]: Toolchain (without parser) took 872.06 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 57.9 MB in the beginning and 83.6 MB in the end (delta: -25.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:02:43,125 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 67.1 MB in the beginning and 67.1 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:02:43,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 865.10 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 57.6 MB in the beginning and 83.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:02:43,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 67.1 MB in the beginning and 67.1 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 865.10 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 57.6 MB in the beginning and 83.6 MB in the end (delta: -26.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH --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 b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:02:45,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:02:45,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:02:45,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:02:45,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:02:45,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:02:45,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:02:45,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:02:45,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:02:45,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:02:45,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:02:45,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:02:45,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:02:45,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:02:45,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:02:45,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:02:45,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:02:45,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:02:45,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:02:45,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:02:45,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:02:45,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:02:45,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:02:45,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:02:45,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:02:45,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:02:45,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:02:45,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:02:45,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:02:45,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:02:45,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:02:45,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:02:45,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:02:45,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:02:45,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:02:45,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:02:45,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:02:45,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:02:45,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:02:45,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:02:45,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:02:45,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:02:45,780 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:02:45,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:02:45,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:02:45,782 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:02:45,782 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:02:45,782 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:02:45,782 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:02:45,783 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:02:45,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:02:45,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:02:45,786 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:02:45,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:02:45,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:02:45,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:02:45,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:02:45,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:02:45,787 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:02:45,787 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:02:45,787 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:02:45,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:02:45,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:02:45,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:02:45,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:02:45,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:02:45,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:02:45,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:02:45,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:45,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:02:45,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:02:45,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:02:45,790 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:02:45,790 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:45,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:02:45,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:02:45,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:02:45,792 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b60f36c6abb85551baa468c8faf905605a37519376312e75fd6944689b1d0b8d [2021-11-03 05:02:46,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:02:46,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:02:46,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:02:46,279 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:02:46,280 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:02:46,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-03 05:02:46,367 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/985ab90e9/1e6344387c424d719b9a8f667ad2058c/FLAGb8492fdba [2021-11-03 05:02:47,218 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:02:47,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2021-11-03 05:02:47,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/985ab90e9/1e6344387c424d719b9a8f667ad2058c/FLAGb8492fdba [2021-11-03 05:02:47,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/data/985ab90e9/1e6344387c424d719b9a8f667ad2058c [2021-11-03 05:02:47,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:02:47,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:02:47,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:47,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:02:47,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:02:47,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:47" (1/1) ... [2021-11-03 05:02:47,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475ccb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:47, skipping insertion in model container [2021-11-03 05:02:47,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:02:47" (1/1) ... [2021-11-03 05:02:47,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:02:47,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:48,051 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-03 05:02:48,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:48,205 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:02:48,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:02:48,296 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-03 05:02:48,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:48,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:02:48,444 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_96d209a9-2954-4cf3-92e0-77f6607e4db0/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c[32398,32411] [2021-11-03 05:02:48,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:02:48,535 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:02:48,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48 WrapperNode [2021-11-03 05:02:48,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:02:48,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:02:48,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:02:48,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:02:48,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:48,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:49,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:02:49,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:02:49,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:02:49,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:02:49,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:49,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:49,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:49,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:49,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:50,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:50,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:50,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:02:50,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:02:50,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:02:50,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:02:50,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (1/1) ... [2021-11-03 05:02:50,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:02:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:02:50,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:02:50,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:02:50,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:02:50,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:02:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:02:50,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:03:18,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:03:18,934 INFO L299 CfgBuilder]: Removed 2477 assume(true) statements. [2021-11-03 05:03:18,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:18 BoogieIcfgContainer [2021-11-03 05:03:18,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:03:18,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:03:18,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:03:18,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:03:18,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:02:47" (1/3) ... [2021-11-03 05:03:18,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8db3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:18, skipping insertion in model container [2021-11-03 05:03:18,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:02:48" (2/3) ... [2021-11-03 05:03:18,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8db3d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:03:18, skipping insertion in model container [2021-11-03 05:03:18,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:03:18" (3/3) ... [2021-11-03 05:03:18,961 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2021-11-03 05:03:18,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:03:18,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-03 05:03:19,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:03:19,091 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 [2021-11-03 05:03:19,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-03 05:03:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 11523 states, 11512 states have (on average 1.8971507991660876) internal successors, (21840), 11522 states have internal predecessors, (21840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:03:19,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:19,377 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] [2021-11-03 05:03:19,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1060902546, now seen corresponding path program 1 times [2021-11-03 05:03:19,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:19,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013079720] [2021-11-03 05:03:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:19,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:19,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:19,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:03:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:03:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:20,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:20,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013079720] [2021-11-03 05:03:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013079720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:20,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:20,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:03:20,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949219743] [2021-11-03 05:03:20,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:03:20,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:20,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:03:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:03:20,337 INFO L87 Difference]: Start difference. First operand has 11523 states, 11512 states have (on average 1.8971507991660876) internal successors, (21840), 11522 states have internal predecessors, (21840), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:26,462 INFO L93 Difference]: Finished difference Result 80283 states and 152161 transitions. [2021-11-03 05:03:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:03:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 30 [2021-11-03 05:03:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:27,057 INFO L225 Difference]: With dead ends: 80283 [2021-11-03 05:03:27,057 INFO L226 Difference]: Without dead ends: 68761 [2021-11-03 05:03:27,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:03:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68761 states. [2021-11-03 05:03:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68761 to 11535. [2021-11-03 05:03:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11535 states, 11525 states have (on average 1.8947505422993491) internal successors, (21837), 11534 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11535 states to 11535 states and 21837 transitions. [2021-11-03 05:03:28,636 INFO L78 Accepts]: Start accepts. Automaton has 11535 states and 21837 transitions. Word has length 30 [2021-11-03 05:03:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:28,637 INFO L470 AbstractCegarLoop]: Abstraction has 11535 states and 21837 transitions. [2021-11-03 05:03:28,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11535 states and 21837 transitions. [2021-11-03 05:03:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 05:03:28,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:28,652 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] [2021-11-03 05:03:28,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:28,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:28,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash 739551464, now seen corresponding path program 1 times [2021-11-03 05:03:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:28,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654083072] [2021-11-03 05:03:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:28,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:28,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:28,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:03:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:29,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:29,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:29,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654083072] [2021-11-03 05:03:29,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654083072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:29,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:29,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:03:29,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286130482] [2021-11-03 05:03:29,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:03:29,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:03:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:03:29,598 INFO L87 Difference]: Start difference. First operand 11535 states and 21837 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:30,225 INFO L93 Difference]: Finished difference Result 22982 states and 43517 transitions. [2021-11-03 05:03:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:03:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-03 05:03:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:30,268 INFO L225 Difference]: With dead ends: 22982 [2021-11-03 05:03:30,268 INFO L226 Difference]: Without dead ends: 11461 [2021-11-03 05:03:30,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:03:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-11-03 05:03:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 11461. [2021-11-03 05:03:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11461 states, 11451 states have (on average 1.894419701336128) internal successors, (21693), 11460 states have internal predecessors, (21693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11461 states to 11461 states and 21693 transitions. [2021-11-03 05:03:30,927 INFO L78 Accepts]: Start accepts. Automaton has 11461 states and 21693 transitions. Word has length 32 [2021-11-03 05:03:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 11461 states and 21693 transitions. [2021-11-03 05:03:30,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 11461 states and 21693 transitions. [2021-11-03 05:03:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:03:30,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:30,941 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] [2021-11-03 05:03:30,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:31,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:31,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1509226250, now seen corresponding path program 1 times [2021-11-03 05:03:31,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:31,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977116520] [2021-11-03 05:03:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:31,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:31,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:31,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:31,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:03:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:31,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:03:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:31,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:31,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:31,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977116520] [2021-11-03 05:03:31,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977116520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:31,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:03:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964582481] [2021-11-03 05:03:31,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:03:31,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:03:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:31,906 INFO L87 Difference]: Start difference. First operand 11461 states and 21693 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:33,237 INFO L93 Difference]: Finished difference Result 22896 states and 43349 transitions. [2021-11-03 05:03:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2021-11-03 05:03:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:33,273 INFO L225 Difference]: With dead ends: 22896 [2021-11-03 05:03:33,273 INFO L226 Difference]: Without dead ends: 11461 [2021-11-03 05:03:33,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:03:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11461 states. [2021-11-03 05:03:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11461 to 11461. [2021-11-03 05:03:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11461 states, 11451 states have (on average 1.893546415160248) internal successors, (21683), 11460 states have internal predecessors, (21683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11461 states to 11461 states and 21683 transitions. [2021-11-03 05:03:33,755 INFO L78 Accepts]: Start accepts. Automaton has 11461 states and 21683 transitions. Word has length 34 [2021-11-03 05:03:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:33,755 INFO L470 AbstractCegarLoop]: Abstraction has 11461 states and 21683 transitions. [2021-11-03 05:03:33,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 11461 states and 21683 transitions. [2021-11-03 05:03:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:03:33,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:33,762 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] [2021-11-03 05:03:33,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:33,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:33,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash -430731520, now seen corresponding path program 1 times [2021-11-03 05:03:33,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:33,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277958579] [2021-11-03 05:03:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:33,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:33,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:33,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:03:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:03:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:34,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:34,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277958579] [2021-11-03 05:03:34,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277958579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:34,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:34,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:03:34,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978099216] [2021-11-03 05:03:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:03:34,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:03:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:03:34,981 INFO L87 Difference]: Start difference. First operand 11461 states and 21683 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:42,856 INFO L93 Difference]: Finished difference Result 51012 states and 96113 transitions. [2021-11-03 05:03:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 05:03:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-03 05:03:42,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:43,001 INFO L225 Difference]: With dead ends: 51012 [2021-11-03 05:03:43,002 INFO L226 Difference]: Without dead ends: 39621 [2021-11-03 05:03:43,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:03:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39621 states. [2021-11-03 05:03:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39621 to 20316. [2021-11-03 05:03:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20316 states, 20306 states have (on average 1.892987294395745) internal successors, (38439), 20315 states have internal predecessors, (38439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20316 states to 20316 states and 38439 transitions. [2021-11-03 05:03:44,379 INFO L78 Accepts]: Start accepts. Automaton has 20316 states and 38439 transitions. Word has length 38 [2021-11-03 05:03:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:44,380 INFO L470 AbstractCegarLoop]: Abstraction has 20316 states and 38439 transitions. [2021-11-03 05:03:44,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 20316 states and 38439 transitions. [2021-11-03 05:03:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:03:44,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:44,382 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] [2021-11-03 05:03:44,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:44,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:44,772 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1123445477, now seen corresponding path program 1 times [2021-11-03 05:03:44,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:44,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632561733] [2021-11-03 05:03:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:44,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:44,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:44,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:03:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:03:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:45,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:45,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:45,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632561733] [2021-11-03 05:03:45,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632561733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:45,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:45,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:03:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954400300] [2021-11-03 05:03:45,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:03:45,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:03:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:03:45,499 INFO L87 Difference]: Start difference. First operand 20316 states and 38439 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:53,447 INFO L93 Difference]: Finished difference Result 171405 states and 324500 transitions. [2021-11-03 05:03:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:03:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-03 05:03:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:54,359 INFO L225 Difference]: With dead ends: 171405 [2021-11-03 05:03:54,359 INFO L226 Difference]: Without dead ends: 151159 [2021-11-03 05:03:54,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:03:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151159 states. [2021-11-03 05:03:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151159 to 38355. [2021-11-03 05:03:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38355 states, 38345 states have (on average 1.8916416742730473) internal successors, (72535), 38354 states have internal predecessors, (72535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38355 states to 38355 states and 72535 transitions. [2021-11-03 05:03:57,290 INFO L78 Accepts]: Start accepts. Automaton has 38355 states and 72535 transitions. Word has length 38 [2021-11-03 05:03:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:57,294 INFO L470 AbstractCegarLoop]: Abstraction has 38355 states and 72535 transitions. [2021-11-03 05:03:57,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 38355 states and 72535 transitions. [2021-11-03 05:03:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:03:57,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:57,295 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] [2021-11-03 05:03:57,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:57,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:57,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:03:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash -447043433, now seen corresponding path program 1 times [2021-11-03 05:03:57,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:57,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108776127] [2021-11-03 05:03:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:57,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:57,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:57,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:57,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:03:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:03:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:58,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:58,113 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:58,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108776127] [2021-11-03 05:03:58,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108776127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:58,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:58,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:03:58,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471020289] [2021-11-03 05:03:58,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:03:58,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:03:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:03:58,115 INFO L87 Difference]: Start difference. First operand 38355 states and 72535 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2021-11-03 05:04:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:01,020 INFO L93 Difference]: Finished difference Result 114065 states and 215731 transitions. [2021-11-03 05:04:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:04:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 39 [2021-11-03 05:04:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:01,170 INFO L225 Difference]: With dead ends: 114065 [2021-11-03 05:04:01,170 INFO L226 Difference]: Without dead ends: 75742 [2021-11-03 05:04:01,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:04:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75742 states. [2021-11-03 05:04:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75742 to 38231. [2021-11-03 05:04:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38231 states, 38221 states have (on average 1.8912901284634103) internal successors, (72287), 38230 states have internal predecessors, (72287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38231 states to 38231 states and 72287 transitions. [2021-11-03 05:04:03,172 INFO L78 Accepts]: Start accepts. Automaton has 38231 states and 72287 transitions. Word has length 39 [2021-11-03 05:04:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:03,172 INFO L470 AbstractCegarLoop]: Abstraction has 38231 states and 72287 transitions. [2021-11-03 05:04:03,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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) [2021-11-03 05:04:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 38231 states and 72287 transitions. [2021-11-03 05:04:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:04:03,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:03,174 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] [2021-11-03 05:04:03,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:03,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:03,388 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:04:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:03,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1605600308, now seen corresponding path program 1 times [2021-11-03 05:04:03,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:03,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819933406] [2021-11-03 05:04:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:03,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:03,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:03,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:03,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:04:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:03,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:04:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:03,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:04,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819933406] [2021-11-03 05:04:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819933406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:04,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:04:04,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579943288] [2021-11-03 05:04:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:04:04,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:04,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:04:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:04:04,134 INFO L87 Difference]: Start difference. First operand 38231 states and 72287 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:18,806 INFO L93 Difference]: Finished difference Result 144418 states and 272775 transitions. [2021-11-03 05:04:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:04:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 05:04:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:19,002 INFO L225 Difference]: With dead ends: 144418 [2021-11-03 05:04:19,002 INFO L226 Difference]: Without dead ends: 106221 [2021-11-03 05:04:19,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:04:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106221 states. [2021-11-03 05:04:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106221 to 74301. [2021-11-03 05:04:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74301 states, 74291 states have (on average 1.8745339273936277) internal successors, (139261), 74300 states have internal predecessors, (139261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74301 states to 74301 states and 139261 transitions. [2021-11-03 05:04:22,318 INFO L78 Accepts]: Start accepts. Automaton has 74301 states and 139261 transitions. Word has length 39 [2021-11-03 05:04:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:22,319 INFO L470 AbstractCegarLoop]: Abstraction has 74301 states and 139261 transitions. [2021-11-03 05:04:22,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 74301 states and 139261 transitions. [2021-11-03 05:04:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:04:22,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:22,321 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] [2021-11-03 05:04:22,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:22,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:22,532 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:04:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1617257651, now seen corresponding path program 1 times [2021-11-03 05:04:22,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:22,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922307834] [2021-11-03 05:04:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:22,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:22,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:22,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d209a9-2954-4cf3-92e0-77f6607e4db0/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:04:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:04:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:23,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:23,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:23,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922307834] [2021-11-03 05:04:23,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922307834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:23,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:23,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:04:23,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446081673] [2021-11-03 05:04:23,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:04:23,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:04:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:04:23,231 INFO L87 Difference]: Start difference. First operand 74301 states and 139261 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)