./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5711b4c0ea669ac051f0ad97dbc3a1a473a1622b7d95c937325001ba5ca1073b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:01,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:01,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:01,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:01,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:01,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:01,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:01,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:01,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:01,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:01,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:01,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:01,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:01,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:01,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:01,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:01,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:01,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:01,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:01,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:01,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:01,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:01,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:01,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:01,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:01,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:01,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:01,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:01,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:01,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:01,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:01,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:01,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:01,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:01,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:01,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:01,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:01,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:01,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:01,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:01,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:01,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:11:01,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:01,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:01,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:02,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:02,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:02,000 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:02,000 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:02,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:02,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:02,009 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:02,010 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:02,010 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:02,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:02,011 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:02,011 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:02,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:02,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:02,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:02,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:02,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:02,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:02,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:02,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:02,014 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:02,014 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:02,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:02,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:02,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:02,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:02,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:02,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:02,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:02,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:02,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:02,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:02,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:02,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:02,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:02,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:02,027 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_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5711b4c0ea669ac051f0ad97dbc3a1a473a1622b7d95c937325001ba5ca1073b [2021-11-07 01:11:02,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:02,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:02,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:02,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:02,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:02,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product32.cil.c [2021-11-07 01:11:02,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/8abe1eb6d/11ef0514278845acb9bc646cac9dd449/FLAGac5ef2b27 [2021-11-07 01:11:03,366 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:03,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c [2021-11-07 01:11:03,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/8abe1eb6d/11ef0514278845acb9bc646cac9dd449/FLAGac5ef2b27 [2021-11-07 01:11:03,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/8abe1eb6d/11ef0514278845acb9bc646cac9dd449 [2021-11-07 01:11:03,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:03,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:03,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:03,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:03,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:03,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:03" (1/1) ... [2021-11-07 01:11:03,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d570f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:03, skipping insertion in model container [2021-11-07 01:11:03,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:03" (1/1) ... [2021-11-07 01:11:03,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:03,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:04,256 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_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c[32699,32712] [2021-11-07 01:11:04,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:04,499 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:11:04,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19863bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:04, skipping insertion in model container [2021-11-07 01:11:04,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:04,500 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:11:04,503 INFO L168 Benchmark]: Toolchain (without parser) took 1001.12 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 57.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:04,504 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 55.5 MB in the beginning and 55.4 MB in the end (delta: 37.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:04,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 997.89 ms. Allocated memory is still 98.6 MB. Free memory was 70.2 MB in the beginning and 57.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:04,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 81.8 MB. Free memory was 55.5 MB in the beginning and 55.4 MB in the end (delta: 37.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 997.89 ms. Allocated memory is still 98.6 MB. Free memory was 70.2 MB in the beginning and 57.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2119]: 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_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5711b4c0ea669ac051f0ad97dbc3a1a473a1622b7d95c937325001ba5ca1073b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:07,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:07,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:07,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:07,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:07,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:07,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:07,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:07,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:07,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:07,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:07,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:07,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:07,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:07,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:07,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:07,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:07,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:07,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:07,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:07,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:07,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:07,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:07,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:07,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:07,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:07,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:07,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:07,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:07,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:07,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:07,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:07,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:07,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:07,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:07,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:07,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:07,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:07,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:07,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:07,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:07,705 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:11:07,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:07,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:07,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:07,748 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:07,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:07,749 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:07,749 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:07,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:07,750 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:07,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:07,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:07,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:07,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:07,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:07,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:07,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:07,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:07,755 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:11:07,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:11:07,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:07,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:07,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:07,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:07,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:07,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:11:07,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:07,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:07,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:07,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:07,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:07,760 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:11:07,760 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:07,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:07,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:07,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:07,761 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_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5711b4c0ea669ac051f0ad97dbc3a1a473a1622b7d95c937325001ba5ca1073b [2021-11-07 01:11:08,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:08,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:08,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:08,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:08,284 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:08,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product32.cil.c [2021-11-07 01:11:08,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/c105d7b68/ad563b35134549dda337c63043e8cc52/FLAG97ddeb47d [2021-11-07 01:11:09,259 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:09,260 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c [2021-11-07 01:11:09,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/c105d7b68/ad563b35134549dda337c63043e8cc52/FLAG97ddeb47d [2021-11-07 01:11:09,323 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/data/c105d7b68/ad563b35134549dda337c63043e8cc52 [2021-11-07 01:11:09,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:09,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:09,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:09,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:09,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:09,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:09" (1/1) ... [2021-11-07 01:11:09,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7bf678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:09, skipping insertion in model container [2021-11-07 01:11:09,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:09" (1/1) ... [2021-11-07 01:11:09,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:09,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:09,979 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_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c[32699,32712] [2021-11-07 01:11:10,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:10,290 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:11:10,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:10,410 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_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c[32699,32712] [2021-11-07 01:11:10,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:10,492 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:10,533 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_64198149-f854-4856-b9af-ad9a31d7932e/sv-benchmarks/c/product-lines/email_spec4_product32.cil.c[32699,32712] [2021-11-07 01:11:10,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:10,639 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:10,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10 WrapperNode [2021-11-07 01:11:10,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:10,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:10,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:10,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:10,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:10,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:10,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:10,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:10,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:10,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:11,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:11,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:11,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:11,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:11,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:11,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:11,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:11,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (1/1) ... [2021-11-07 01:11:11,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:11,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:11,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:11,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:11:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:11:11,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:11:11,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:11,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:17,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:17,556 INFO L299 CfgBuilder]: Removed 681 assume(true) statements. [2021-11-07 01:11:17,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:17 BoogieIcfgContainer [2021-11-07 01:11:17,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:17,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:17,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:17,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:17,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:09" (1/3) ... [2021-11-07 01:11:17,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231d6e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:17, skipping insertion in model container [2021-11-07 01:11:17,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10" (2/3) ... [2021-11-07 01:11:17,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231d6e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:17, skipping insertion in model container [2021-11-07 01:11:17,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:17" (3/3) ... [2021-11-07 01:11:17,571 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product32.cil.c [2021-11-07 01:11:17,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:17,577 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:11:17,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:17,665 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:11:17,665 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:11:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 1073 states have (on average 1.7576887232059646) internal successors, (1886), 1079 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:11:17,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:17,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:17,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 861114942, now seen corresponding path program 1 times [2021-11-07 01:11:17,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:17,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375742543] [2021-11-07 01:11:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:17,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:17,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:17,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:11:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:18,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375742543] [2021-11-07 01:11:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375742543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:18,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:11:18,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398810570] [2021-11-07 01:11:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:11:18,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:11:18,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:18,825 INFO L87 Difference]: Start difference. First operand has 1080 states, 1073 states have (on average 1.7576887232059646) internal successors, (1886), 1079 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:18,949 INFO L93 Difference]: Finished difference Result 1875 states and 3249 transitions. [2021-11-07 01:11:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:11:18,951 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-07 01:11:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:18,985 INFO L225 Difference]: With dead ends: 1875 [2021-11-07 01:11:18,986 INFO L226 Difference]: Without dead ends: 928 [2021-11-07 01:11:18,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-11-07 01:11:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2021-11-07 01:11:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 922 states have (on average 1.7537960954446854) internal successors, (1617), 927 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1617 transitions. [2021-11-07 01:11:19,145 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1617 transitions. Word has length 50 [2021-11-07 01:11:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:19,146 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1617 transitions. [2021-11-07 01:11:19,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1617 transitions. [2021-11-07 01:11:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:11:19,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:19,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:19,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:19,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:19,368 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:19,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1212884854, now seen corresponding path program 1 times [2021-11-07 01:11:19,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:19,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362547052] [2021-11-07 01:11:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:19,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:19,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:19,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:20,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:20,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:20,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362547052] [2021-11-07 01:11:20,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362547052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:20,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:20,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:20,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679525387] [2021-11-07 01:11:20,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:20,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:20,360 INFO L87 Difference]: Start difference. First operand 928 states and 1617 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:20,540 INFO L93 Difference]: Finished difference Result 2754 states and 4803 transitions. [2021-11-07 01:11:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2021-11-07 01:11:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:20,560 INFO L225 Difference]: With dead ends: 2754 [2021-11-07 01:11:20,561 INFO L226 Difference]: Without dead ends: 1841 [2021-11-07 01:11:20,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-07 01:11:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 927. [2021-11-07 01:11:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 921 states have (on average 1.750271444082519) internal successors, (1612), 926 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1612 transitions. [2021-11-07 01:11:20,660 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1612 transitions. Word has length 51 [2021-11-07 01:11:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:20,661 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1612 transitions. [2021-11-07 01:11:20,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,661 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1612 transitions. [2021-11-07 01:11:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:11:20,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:20,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:20,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:20,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:20,897 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1908050268, now seen corresponding path program 1 times [2021-11-07 01:11:20,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:20,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650584521] [2021-11-07 01:11:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:20,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:20,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:20,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:20,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:21,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650584521] [2021-11-07 01:11:21,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650584521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:21,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:21,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:21,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017504651] [2021-11-07 01:11:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:21,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:21,908 INFO L87 Difference]: Start difference. First operand 927 states and 1612 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-11-07 01:11:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:22,372 INFO L93 Difference]: Finished difference Result 3625 states and 6310 transitions. [2021-11-07 01:11:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 53 [2021-11-07 01:11:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:22,394 INFO L225 Difference]: With dead ends: 3625 [2021-11-07 01:11:22,394 INFO L226 Difference]: Without dead ends: 2716 [2021-11-07 01:11:22,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-11-07 01:11:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 926. [2021-11-07 01:11:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 920 states have (on average 1.7478260869565216) internal successors, (1608), 925 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1608 transitions. [2021-11-07 01:11:22,488 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1608 transitions. Word has length 53 [2021-11-07 01:11:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:22,489 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1608 transitions. [2021-11-07 01:11:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-11-07 01:11:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1608 transitions. [2021-11-07 01:11:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:11:22,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:22,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:22,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:22,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 537371695, now seen corresponding path program 1 times [2021-11-07 01:11:22,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:22,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257691563] [2021-11-07 01:11:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:22,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:22,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:23,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:23,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:23,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:23,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257691563] [2021-11-07 01:11:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257691563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:23,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:23,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:23,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732424524] [2021-11-07 01:11:23,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:23,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:23,670 INFO L87 Difference]: Start difference. First operand 926 states and 1608 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:23,791 INFO L93 Difference]: Finished difference Result 1849 states and 3213 transitions. [2021-11-07 01:11:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 54 [2021-11-07 01:11:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:23,800 INFO L225 Difference]: With dead ends: 1849 [2021-11-07 01:11:23,800 INFO L226 Difference]: Without dead ends: 931 [2021-11-07 01:11:23,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-11-07 01:11:23,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 926. [2021-11-07 01:11:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 920 states have (on average 1.7445652173913044) internal successors, (1605), 925 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1605 transitions. [2021-11-07 01:11:23,871 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1605 transitions. Word has length 54 [2021-11-07 01:11:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:23,872 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1605 transitions. [2021-11-07 01:11:23,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1605 transitions. [2021-11-07 01:11:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:11:23,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:23,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:23,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:24,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1095964092, now seen corresponding path program 1 times [2021-11-07 01:11:24,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:24,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658634850] [2021-11-07 01:11:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:24,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:24,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:24,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:11:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:24,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:24,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658634850] [2021-11-07 01:11:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658634850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:24,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:24,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:24,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158624313] [2021-11-07 01:11:24,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:24,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:24,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:24,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:24,972 INFO L87 Difference]: Start difference. First operand 926 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:25,388 INFO L93 Difference]: Finished difference Result 3612 states and 6286 transitions. [2021-11-07 01:11:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 55 [2021-11-07 01:11:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:25,410 INFO L225 Difference]: With dead ends: 3612 [2021-11-07 01:11:25,411 INFO L226 Difference]: Without dead ends: 2712 [2021-11-07 01:11:25,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-11-07 01:11:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 926. [2021-11-07 01:11:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 920 states have (on average 1.741304347826087) internal successors, (1602), 925 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1602 transitions. [2021-11-07 01:11:25,559 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1602 transitions. Word has length 55 [2021-11-07 01:11:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:25,560 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1602 transitions. [2021-11-07 01:11:25,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1602 transitions. [2021-11-07 01:11:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:11:25,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:25,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:25,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:25,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1920444543, now seen corresponding path program 1 times [2021-11-07 01:11:25,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:25,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783556555] [2021-11-07 01:11:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:25,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:25,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:25,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:11:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:26,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:26,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783556555] [2021-11-07 01:11:26,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783556555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:26,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:26,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:26,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348988423] [2021-11-07 01:11:26,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:26,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:26,722 INFO L87 Difference]: Start difference. First operand 926 states and 1602 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:26,944 INFO L93 Difference]: Finished difference Result 2469 states and 4271 transitions. [2021-11-07 01:11:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 57 [2021-11-07 01:11:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:26,959 INFO L225 Difference]: With dead ends: 2469 [2021-11-07 01:11:26,960 INFO L226 Difference]: Without dead ends: 1826 [2021-11-07 01:11:26,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-11-07 01:11:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1183. [2021-11-07 01:11:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1177 states have (on average 1.7629566694987255) internal successors, (2075), 1182 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2075 transitions. [2021-11-07 01:11:27,088 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2075 transitions. Word has length 57 [2021-11-07 01:11:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:27,089 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 2075 transitions. [2021-11-07 01:11:27,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2075 transitions. [2021-11-07 01:11:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:11:27,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:27,093 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:27,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:27,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,310 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash 384995728, now seen corresponding path program 1 times [2021-11-07 01:11:27,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:27,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592911036] [2021-11-07 01:11:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:27,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:27,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:27,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:11:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:28,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592911036] [2021-11-07 01:11:28,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592911036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:28,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:28,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:28,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072938571] [2021-11-07 01:11:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,303 INFO L87 Difference]: Start difference. First operand 1183 states and 2075 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:28,491 INFO L93 Difference]: Finished difference Result 3130 states and 5491 transitions. [2021-11-07 01:11:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:11:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:28,508 INFO L225 Difference]: With dead ends: 3130 [2021-11-07 01:11:28,508 INFO L226 Difference]: Without dead ends: 2031 [2021-11-07 01:11:28,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-07 01:11:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1388. [2021-11-07 01:11:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1382 states have (on average 1.7735166425470332) internal successors, (2451), 1387 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2451 transitions. [2021-11-07 01:11:28,640 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2451 transitions. Word has length 69 [2021-11-07 01:11:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:28,640 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2451 transitions. [2021-11-07 01:11:28,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2451 transitions. [2021-11-07 01:11:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:11:28,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:28,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:28,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:28,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:28,865 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -112981457, now seen corresponding path program 1 times [2021-11-07 01:11:28,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:28,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245301413] [2021-11-07 01:11:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:28,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:28,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:28,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:11:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:29,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:29,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245301413] [2021-11-07 01:11:29,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245301413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:29,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:29,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:29,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855490120] [2021-11-07 01:11:29,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:29,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:29,992 INFO L87 Difference]: Start difference. First operand 1388 states and 2451 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:30,187 INFO L93 Difference]: Finished difference Result 3777 states and 6684 transitions. [2021-11-07 01:11:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:11:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:30,207 INFO L225 Difference]: With dead ends: 3777 [2021-11-07 01:11:30,207 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 01:11:30,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 01:11:30,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1838. [2021-11-07 01:11:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1832 states have (on average 1.7898471615720524) internal successors, (3279), 1837 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3279 transitions. [2021-11-07 01:11:30,418 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3279 transitions. Word has length 70 [2021-11-07 01:11:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:30,419 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3279 transitions. [2021-11-07 01:11:30,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3279 transitions. [2021-11-07 01:11:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:11:30,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:30,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:30,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 107537214, now seen corresponding path program 1 times [2021-11-07 01:11:30,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:30,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928412278] [2021-11-07 01:11:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:30,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:30,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:11:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:31,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:31,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:31,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:31,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928412278] [2021-11-07 01:11:31,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928412278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:31,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:31,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:31,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272632510] [2021-11-07 01:11:31,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:31,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,671 INFO L87 Difference]: Start difference. First operand 1838 states and 3279 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:31,934 INFO L93 Difference]: Finished difference Result 5107 states and 9137 transitions. [2021-11-07 01:11:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:11:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:31,963 INFO L225 Difference]: With dead ends: 5107 [2021-11-07 01:11:31,963 INFO L226 Difference]: Without dead ends: 3369 [2021-11-07 01:11:31,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-11-07 01:11:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2726. [2021-11-07 01:11:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2720 states have (on average 1.8066176470588236) internal successors, (4914), 2725 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 4914 transitions. [2021-11-07 01:11:32,238 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 4914 transitions. Word has length 71 [2021-11-07 01:11:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:32,239 INFO L470 AbstractCegarLoop]: Abstraction has 2726 states and 4914 transitions. [2021-11-07 01:11:32,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 4914 transitions. [2021-11-07 01:11:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:11:32,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:32,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:32,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:32,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash 949166270, now seen corresponding path program 1 times [2021-11-07 01:11:32,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:32,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268793337] [2021-11-07 01:11:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:32,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:32,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:32,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:11:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:33,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268793337] [2021-11-07 01:11:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268793337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:33,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726527356] [2021-11-07 01:11:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:33,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:33,583 INFO L87 Difference]: Start difference. First operand 2726 states and 4914 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:33,911 INFO L93 Difference]: Finished difference Result 7507 states and 13561 transitions. [2021-11-07 01:11:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:11:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:33,957 INFO L225 Difference]: With dead ends: 7507 [2021-11-07 01:11:33,957 INFO L226 Difference]: Without dead ends: 4915 [2021-11-07 01:11:33,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-11-07 01:11:34,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4272. [2021-11-07 01:11:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4266 states have (on average 1.8187998124706986) internal successors, (7759), 4271 states have internal predecessors, (7759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 7759 transitions. [2021-11-07 01:11:34,326 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 7759 transitions. Word has length 72 [2021-11-07 01:11:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:34,326 INFO L470 AbstractCegarLoop]: Abstraction has 4272 states and 7759 transitions. [2021-11-07 01:11:34,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 7759 transitions. [2021-11-07 01:11:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:11:34,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:34,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:34,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:34,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:34,557 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash 660851887, now seen corresponding path program 1 times [2021-11-07 01:11:34,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:34,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788855725] [2021-11-07 01:11:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:34,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:34,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:34,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:11:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:35,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:35,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:35,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788855725] [2021-11-07 01:11:35,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788855725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:35,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:35,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:35,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336465427] [2021-11-07 01:11:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:35,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:35,849 INFO L87 Difference]: Start difference. First operand 4272 states and 7759 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:36,405 INFO L93 Difference]: Finished difference Result 11861 states and 21579 transitions. [2021-11-07 01:11:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:11:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:36,436 INFO L225 Difference]: With dead ends: 11861 [2021-11-07 01:11:36,436 INFO L226 Difference]: Without dead ends: 7757 [2021-11-07 01:11:36,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:36,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7757 states. [2021-11-07 01:11:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7757 to 7114. [2021-11-07 01:11:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7114 states, 7108 states have (on average 1.826674169949353) internal successors, (12984), 7113 states have internal predecessors, (12984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 12984 transitions. [2021-11-07 01:11:37,050 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 12984 transitions. Word has length 73 [2021-11-07 01:11:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:37,052 INFO L470 AbstractCegarLoop]: Abstraction has 7114 states and 12984 transitions. [2021-11-07 01:11:37,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 12984 transitions. [2021-11-07 01:11:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:11:37,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:37,063 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:37,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:37,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2124185871, now seen corresponding path program 1 times [2021-11-07 01:11:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:37,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032207496] [2021-11-07 01:11:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:37,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:37,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:11:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:38,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:38,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:38,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032207496] [2021-11-07 01:11:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032207496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:38,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:38,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:38,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082709682] [2021-11-07 01:11:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:38,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:38,483 INFO L87 Difference]: Start difference. First operand 7114 states and 12984 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:39,177 INFO L93 Difference]: Finished difference Result 20845 states and 38096 transitions. [2021-11-07 01:11:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:11:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:39,234 INFO L225 Difference]: With dead ends: 20845 [2021-11-07 01:11:39,234 INFO L226 Difference]: Without dead ends: 13903 [2021-11-07 01:11:39,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13903 states. [2021-11-07 01:11:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13903 to 13260. [2021-11-07 01:11:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13260 states, 13254 states have (on average 1.8307680700165987) internal successors, (24265), 13259 states have internal predecessors, (24265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13260 states to 13260 states and 24265 transitions. [2021-11-07 01:11:40,264 INFO L78 Accepts]: Start accepts. Automaton has 13260 states and 24265 transitions. Word has length 74 [2021-11-07 01:11:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:40,265 INFO L470 AbstractCegarLoop]: Abstraction has 13260 states and 24265 transitions. [2021-11-07 01:11:40,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13260 states and 24265 transitions. [2021-11-07 01:11:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:11:40,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:40,279 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:40,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash -807938273, now seen corresponding path program 1 times [2021-11-07 01:11:40,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:40,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604945991] [2021-11-07 01:11:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:40,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:40,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:40,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:11:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:11:41,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:11:41,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:41,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604945991] [2021-11-07 01:11:41,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604945991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:41,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:41,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:41,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374652035] [2021-11-07 01:11:41,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:41,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:41,786 INFO L87 Difference]: Start difference. First operand 13260 states and 24265 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:45,184 INFO L93 Difference]: Finished difference Result 32949 states and 60286 transitions. [2021-11-07 01:11:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 75 [2021-11-07 01:11:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:45,250 INFO L225 Difference]: With dead ends: 32949 [2021-11-07 01:11:45,251 INFO L226 Difference]: Without dead ends: 19982 [2021-11-07 01:11:45,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:11:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-11-07 01:11:46,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 13227. [2021-11-07 01:11:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13227 states, 13221 states have (on average 1.825353604114666) internal successors, (24133), 13226 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13227 states to 13227 states and 24133 transitions. [2021-11-07 01:11:46,264 INFO L78 Accepts]: Start accepts. Automaton has 13227 states and 24133 transitions. Word has length 75 [2021-11-07 01:11:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:46,264 INFO L470 AbstractCegarLoop]: Abstraction has 13227 states and 24133 transitions. [2021-11-07 01:11:46,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 13227 states and 24133 transitions. [2021-11-07 01:11:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:11:46,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:46,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:46,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:46,496 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1638339490, now seen corresponding path program 1 times [2021-11-07 01:11:46,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:46,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997437872] [2021-11-07 01:11:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:46,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:46,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:46,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:46,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:11:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:47,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:47,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:47,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:47,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997437872] [2021-11-07 01:11:47,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997437872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:47,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:47,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:47,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202124048] [2021-11-07 01:11:47,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:47,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:47,646 INFO L87 Difference]: Start difference. First operand 13227 states and 24133 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:48,695 INFO L93 Difference]: Finished difference Result 38888 states and 71026 transitions. [2021-11-07 01:11:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:11:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:48,763 INFO L225 Difference]: With dead ends: 38888 [2021-11-07 01:11:48,764 INFO L226 Difference]: Without dead ends: 25840 [2021-11-07 01:11:48,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2021-11-07 01:11:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 25197. [2021-11-07 01:11:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25197 states, 25191 states have (on average 1.8269223135246715) internal successors, (46022), 25196 states have internal predecessors, (46022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25197 states to 25197 states and 46022 transitions. [2021-11-07 01:11:50,365 INFO L78 Accepts]: Start accepts. Automaton has 25197 states and 46022 transitions. Word has length 75 [2021-11-07 01:11:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:50,365 INFO L470 AbstractCegarLoop]: Abstraction has 25197 states and 46022 transitions. [2021-11-07 01:11:50,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 25197 states and 46022 transitions. [2021-11-07 01:11:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:11:50,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:50,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:50,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:50,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:50,604 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1382551727, now seen corresponding path program 1 times [2021-11-07 01:11:50,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:50,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908610551] [2021-11-07 01:11:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:50,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:50,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:50,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:11:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:51,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:51,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:51,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908610551] [2021-11-07 01:11:51,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908610551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:51,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:51,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:51,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028327369] [2021-11-07 01:11:51,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:51,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:51,689 INFO L87 Difference]: Start difference. First operand 25197 states and 46022 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:53,810 INFO L93 Difference]: Finished difference Result 69437 states and 126429 transitions. [2021-11-07 01:11:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:11:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:53,914 INFO L225 Difference]: With dead ends: 69437 [2021-11-07 01:11:53,914 INFO L226 Difference]: Without dead ends: 44466 [2021-11-07 01:11:53,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44466 states. [2021-11-07 01:11:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44466 to 43823. [2021-11-07 01:11:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43823 states, 43817 states have (on average 1.815710797179177) internal successors, (79559), 43822 states have internal predecessors, (79559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43823 states to 43823 states and 79559 transitions. [2021-11-07 01:11:56,425 INFO L78 Accepts]: Start accepts. Automaton has 43823 states and 79559 transitions. Word has length 76 [2021-11-07 01:11:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:56,425 INFO L470 AbstractCegarLoop]: Abstraction has 43823 states and 79559 transitions. [2021-11-07 01:11:56,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 43823 states and 79559 transitions. [2021-11-07 01:11:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:11:56,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:56,441 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:56,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:11:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:56,657 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:11:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 362963813, now seen corresponding path program 1 times [2021-11-07 01:11:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:56,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991500435] [2021-11-07 01:11:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:56,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:56,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:56,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:56,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:11:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:11:58,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:58,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991500435] [2021-11-07 01:11:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991500435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:58,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:58,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071584970] [2021-11-07 01:11:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:58,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:58,034 INFO L87 Difference]: Start difference. First operand 43823 states and 79559 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:05,972 INFO L93 Difference]: Finished difference Result 170572 states and 309558 transitions. [2021-11-07 01:12:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:12:05,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 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 77 [2021-11-07 01:12:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,287 INFO L225 Difference]: With dead ends: 170572 [2021-11-07 01:12:06,287 INFO L226 Difference]: Without dead ends: 127041 [2021-11-07 01:12:06,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127041 states. [2021-11-07 01:12:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127041 to 43565. [2021-11-07 01:12:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43565 states, 43559 states have (on average 1.8027732500746114) internal successors, (78527), 43564 states have internal predecessors, (78527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43565 states to 43565 states and 78527 transitions. [2021-11-07 01:12:09,919 INFO L78 Accepts]: Start accepts. Automaton has 43565 states and 78527 transitions. Word has length 77 [2021-11-07 01:12:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 43565 states and 78527 transitions. [2021-11-07 01:12:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 43565 states and 78527 transitions. [2021-11-07 01:12:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:12:09,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:09,928 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:09,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:10,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:10,129 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash 71879043, now seen corresponding path program 1 times [2021-11-07 01:12:10,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:10,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346862887] [2021-11-07 01:12:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:10,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:10,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:10,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:12:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:11,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:11,442 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:11,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346862887] [2021-11-07 01:12:11,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346862887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:11,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:11,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:12:11,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358271824] [2021-11-07 01:12:11,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:12:11,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:12:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:11,445 INFO L87 Difference]: Start difference. First operand 43565 states and 78527 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:14,084 INFO L93 Difference]: Finished difference Result 87475 states and 157649 transitions. [2021-11-07 01:12:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:12:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:14,162 INFO L225 Difference]: With dead ends: 87475 [2021-11-07 01:12:14,163 INFO L226 Difference]: Without dead ends: 44208 [2021-11-07 01:12:14,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44208 states. [2021-11-07 01:12:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44208 to 43565. [2021-11-07 01:12:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43565 states, 43559 states have (on average 1.7998347069491953) internal successors, (78399), 43564 states have internal predecessors, (78399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43565 states to 43565 states and 78399 transitions. [2021-11-07 01:12:17,044 INFO L78 Accepts]: Start accepts. Automaton has 43565 states and 78399 transitions. Word has length 77 [2021-11-07 01:12:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:17,048 INFO L470 AbstractCegarLoop]: Abstraction has 43565 states and 78399 transitions. [2021-11-07 01:12:17,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 43565 states and 78399 transitions. [2021-11-07 01:12:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:12:17,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:17,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:17,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:17,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:17,259 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:12:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1513834448, now seen corresponding path program 1 times [2021-11-07 01:12:17,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:17,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468928534] [2021-11-07 01:12:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:17,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:17,263 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:17,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64198149-f854-4856-b9af-ad9a31d7932e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:12:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:18,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:18,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:18,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468928534] [2021-11-07 01:12:18,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468928534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:18,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:18,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:18,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325897636] [2021-11-07 01:12:18,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:18,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:18,642 INFO L87 Difference]: Start difference. First operand 43565 states and 78399 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)