./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:01,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:01,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:01,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:01,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:01,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:01,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:01,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:01,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:01,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:01,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:01,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:01,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:01,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:01,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:01,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:01,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:01,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:01,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:01,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:01,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:01,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:01,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:01,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:01,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:01,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:01,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:01,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:01,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:01,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:01,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:01,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:01,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:01,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:01,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:01,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:01,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:01,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:01,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:01,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:01,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:01,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:39:01,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:01,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:01,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:01,949 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:01,949 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:01,949 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:01,950 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:01,950 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:01,950 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:01,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:01,952 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:01,952 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:01,953 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:01,953 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:01,953 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:01,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:01,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:01,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:01,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:01,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:01,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:01,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:01,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:01,957 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:01,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:01,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:01,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:01,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:01,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:01,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:01,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:01,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:01,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:01,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:01,962 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:01,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:01,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:01,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:01,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:01,964 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 [2021-11-07 01:39:02,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:02,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:02,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:02,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:02,347 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:02,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-07 01:39:02,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/188d1cc5a/98638c9b390b4025a3d6f17f285771a7/FLAG6f08ea3f0 [2021-11-07 01:39:03,198 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:03,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-07 01:39:03,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/188d1cc5a/98638c9b390b4025a3d6f17f285771a7/FLAG6f08ea3f0 [2021-11-07 01:39:03,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/188d1cc5a/98638c9b390b4025a3d6f17f285771a7 [2021-11-07 01:39:03,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:03,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:03,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:03,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:03,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:03,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:03" (1/1) ... [2021-11-07 01:39:03,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf0b3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:03, skipping insertion in model container [2021-11-07 01:39:03,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:03" (1/1) ... [2021-11-07 01:39:03,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:03,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:04,253 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-07 01:39:04,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:04,272 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 01:39:04,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f3cebaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:04, skipping insertion in model container [2021-11-07 01:39:04,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:04,273 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:04,276 INFO L168 Benchmark]: Toolchain (without parser) took 921.54 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 45.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:04,277 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 59.8 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:04,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 918.48 ms. Allocated memory is still 83.9 MB. Free memory was 59.6 MB in the beginning and 45.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:04,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 59.8 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 918.48 ms. Allocated memory is still 83.9 MB. Free memory was 59.6 MB in the beginning and 45.6 MB in the end (delta: 14.0 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: 2421]: 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:07,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:07,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:07,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:07,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:07,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:07,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:07,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:07,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:07,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:07,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:07,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:07,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:07,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:07,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:07,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:07,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:07,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:07,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:07,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:07,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:07,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:07,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:07,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:07,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:07,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:07,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:07,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:07,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:07,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:07,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:07,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:07,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:07,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:07,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:07,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:07,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:07,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:07,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:07,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:07,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:07,454 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:39:07,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:07,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:07,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:07,516 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:07,516 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:07,516 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:07,517 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:07,517 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:07,517 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:07,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:07,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:07,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:07,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:07,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:07,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:07,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:07,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:07,527 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:07,527 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:07,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:07,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:07,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:07,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:07,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:07,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:07,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:07,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:07,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:07,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:07,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:07,531 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:07,531 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:07,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:07,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:07,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:07,533 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80e9bbe10488e38c848fee2c8f87fc84d027f309ec95e867f80c828929ca07a3 [2021-11-07 01:39:08,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:08,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:08,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:08,066 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:08,067 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:08,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-07 01:39:08,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/23cadfdfc/98849a196eb94273b87007c685f6ce25/FLAG8b7817c52 [2021-11-07 01:39:08,959 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:08,960 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c [2021-11-07 01:39:08,993 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/23cadfdfc/98849a196eb94273b87007c685f6ce25/FLAG8b7817c52 [2021-11-07 01:39:09,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/data/23cadfdfc/98849a196eb94273b87007c685f6ce25 [2021-11-07 01:39:09,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:09,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:09,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:09,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:09,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:09,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:09" (1/1) ... [2021-11-07 01:39:09,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec8035e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:09, skipping insertion in model container [2021-11-07 01:39:09,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:09" (1/1) ... [2021-11-07 01:39:09,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:09,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:10,178 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-07 01:39:10,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:10,200 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:10,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:10,345 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-07 01:39:10,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:10,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:10,455 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_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/sv-benchmarks/c/product-lines/email_spec4_product30.cil.c[64112,64125] [2021-11-07 01:39:10,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:10,511 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:10,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10 WrapperNode [2021-11-07 01:39:10,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:10,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:10,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:10,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:10,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:10,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:10,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:10,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:10,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:10,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:10,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:10,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:10,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (1/1) ... [2021-11-07 01:39:10,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:10,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:11,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:11,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:39:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:39:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:11,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:39:16,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:16,235 INFO L299 CfgBuilder]: Removed 319 assume(true) statements. [2021-11-07 01:39:16,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:16 BoogieIcfgContainer [2021-11-07 01:39:16,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:16,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:16,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:16,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:16,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:09" (1/3) ... [2021-11-07 01:39:16,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20730140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:16, skipping insertion in model container [2021-11-07 01:39:16,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:10" (2/3) ... [2021-11-07 01:39:16,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20730140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:16, skipping insertion in model container [2021-11-07 01:39:16,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:16" (3/3) ... [2021-11-07 01:39:16,250 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product30.cil.c [2021-11-07 01:39:16,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:16,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:39:16,356 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:39:16,364 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 01:39:16,365 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:39:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 505 states, 502 states have (on average 1.7609561752988048) internal successors, (884), 504 states have internal predecessors, (884), 0 states have call successors, (0), 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 01:39:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:39:16,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:16,423 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] [2021-11-07 01:39:16,424 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1911646779, now seen corresponding path program 1 times [2021-11-07 01:39:16,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:16,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56973428] [2021-11-07 01:39:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:16,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:16,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:16,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:39:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:39:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:17,198 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 01:39:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:17,364 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 01:39:17,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:17,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56973428] [2021-11-07 01:39:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56973428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:17,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:17,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:39:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729064467] [2021-11-07 01:39:17,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:39:17,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:39:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:17,408 INFO L87 Difference]: Start difference. First operand has 505 states, 502 states have (on average 1.7609561752988048) internal successors, (884), 504 states have internal predecessors, (884), 0 states have call successors, (0), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:39:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:17,485 INFO L93 Difference]: Finished difference Result 768 states and 1327 transitions. [2021-11-07 01:39:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:39:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 01:39:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:17,538 INFO L225 Difference]: With dead ends: 768 [2021-11-07 01:39:17,540 INFO L226 Difference]: Without dead ends: 427 [2021-11-07 01:39:17,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 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 01:39:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-07 01:39:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2021-11-07 01:39:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 425 states have (on average 1.7576470588235293) internal successors, (747), 426 states have internal predecessors, (747), 0 states have call successors, (0), 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 01:39:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 747 transitions. [2021-11-07 01:39:17,644 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 747 transitions. Word has length 47 [2021-11-07 01:39:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:17,645 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 747 transitions. [2021-11-07 01:39:17,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 01:39:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 747 transitions. [2021-11-07 01:39:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:39:17,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:17,651 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] [2021-11-07 01:39:17,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:17,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:17,863 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1819110920, now seen corresponding path program 1 times [2021-11-07 01:39:17,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:17,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856161659] [2021-11-07 01:39:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:17,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:17,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:17,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:39:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:18,557 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 01:39:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:18,727 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 01:39:18,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:18,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856161659] [2021-11-07 01:39:18,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856161659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:18,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:18,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:18,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528094233] [2021-11-07 01:39:18,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:18,733 INFO L87 Difference]: Start difference. First operand 427 states and 747 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 01:39:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:18,894 INFO L93 Difference]: Finished difference Result 1251 states and 2193 transitions. [2021-11-07 01:39:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 48 [2021-11-07 01:39:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:18,905 INFO L225 Difference]: With dead ends: 1251 [2021-11-07 01:39:18,906 INFO L226 Difference]: Without dead ends: 839 [2021-11-07 01:39:18,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:39:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-07 01:39:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 426. [2021-11-07 01:39:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 424 states have (on average 1.75) internal successors, (742), 425 states have internal predecessors, (742), 0 states have call successors, (0), 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 01:39:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 742 transitions. [2021-11-07 01:39:18,995 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 742 transitions. Word has length 48 [2021-11-07 01:39:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:18,996 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 742 transitions. [2021-11-07 01:39:18,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 01:39:18,997 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 742 transitions. [2021-11-07 01:39:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:39:19,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:19,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:19,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:19,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:19,231 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 34793938, now seen corresponding path program 1 times [2021-11-07 01:39:19,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:19,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256597603] [2021-11-07 01:39:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:19,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:19,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:19,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:39:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:39:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:19,951 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 01:39:19,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:20,152 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 01:39:20,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:20,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256597603] [2021-11-07 01:39:20,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256597603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:20,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:20,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:20,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53937389] [2021-11-07 01:39:20,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:20,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:20,157 INFO L87 Difference]: Start difference. First operand 426 states and 742 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:39:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:20,475 INFO L93 Difference]: Finished difference Result 1621 states and 2830 transitions. [2021-11-07 01:39:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:39:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:39:20,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:20,486 INFO L225 Difference]: With dead ends: 1621 [2021-11-07 01:39:20,487 INFO L226 Difference]: Without dead ends: 1213 [2021-11-07 01:39:20,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 01:39:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-07 01:39:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 425. [2021-11-07 01:39:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.7446808510638299) internal successors, (738), 424 states have internal predecessors, (738), 0 states have call successors, (0), 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 01:39:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 738 transitions. [2021-11-07 01:39:20,531 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 738 transitions. Word has length 50 [2021-11-07 01:39:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:20,531 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 738 transitions. [2021-11-07 01:39:20,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:39:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 738 transitions. [2021-11-07 01:39:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:39:20,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:20,534 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 01:39:20,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:39:20,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:20,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1919481823, now seen corresponding path program 1 times [2021-11-07 01:39:20,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:20,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762297872] [2021-11-07 01:39:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:20,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:20,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:20,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:39:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:21,535 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 01:39:21,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:21,731 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 01:39:21,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:21,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762297872] [2021-11-07 01:39:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762297872] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:21,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:21,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750940234] [2021-11-07 01:39:21,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:21,735 INFO L87 Difference]: Start difference. First operand 425 states and 738 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:39:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:21,819 INFO L93 Difference]: Finished difference Result 847 states and 1473 transitions. [2021-11-07 01:39:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:39:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:21,824 INFO L225 Difference]: With dead ends: 847 [2021-11-07 01:39:21,824 INFO L226 Difference]: Without dead ends: 430 [2021-11-07 01:39:21,825 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 01:39:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-07 01:39:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 425. [2021-11-07 01:39:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.7375886524822695) internal successors, (735), 424 states have internal predecessors, (735), 0 states have call successors, (0), 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 01:39:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 735 transitions. [2021-11-07 01:39:21,867 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 735 transitions. Word has length 51 [2021-11-07 01:39:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:21,867 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 735 transitions. [2021-11-07 01:39:21,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:39:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 735 transitions. [2021-11-07 01:39:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:39:21,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:21,870 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] [2021-11-07 01:39:21,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:22,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:22,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1394504170, now seen corresponding path program 1 times [2021-11-07 01:39:22,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:22,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857073636] [2021-11-07 01:39:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:22,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:22,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:22,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:39:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:39:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:22,815 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 01:39:22,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:23,015 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 01:39:23,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:23,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857073636] [2021-11-07 01:39:23,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857073636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:23,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:23,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:23,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385089326] [2021-11-07 01:39:23,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:23,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:23,019 INFO L87 Difference]: Start difference. First operand 425 states and 735 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 01:39:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:23,367 INFO L93 Difference]: Finished difference Result 1608 states and 2806 transitions. [2021-11-07 01:39:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:39:23,368 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 52 [2021-11-07 01:39:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:23,378 INFO L225 Difference]: With dead ends: 1608 [2021-11-07 01:39:23,378 INFO L226 Difference]: Without dead ends: 1209 [2021-11-07 01:39:23,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 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 01:39:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-07 01:39:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 425. [2021-11-07 01:39:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 423 states have (on average 1.7304964539007093) internal successors, (732), 424 states have internal predecessors, (732), 0 states have call successors, (0), 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 01:39:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 732 transitions. [2021-11-07 01:39:23,434 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 732 transitions. Word has length 52 [2021-11-07 01:39:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:23,434 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 732 transitions. [2021-11-07 01:39:23,435 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 01:39:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 732 transitions. [2021-11-07 01:39:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:39:23,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:23,437 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 01:39:23,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:39:23,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:23,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1962923407, now seen corresponding path program 1 times [2021-11-07 01:39:23,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:23,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864849863] [2021-11-07 01:39:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:23,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:23,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:23,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:39:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:24,413 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 01:39:24,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:24,579 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 01:39:24,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:24,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864849863] [2021-11-07 01:39:24,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864849863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:24,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:24,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129420186] [2021-11-07 01:39:24,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:24,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:24,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:24,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:24,583 INFO L87 Difference]: Start difference. First operand 425 states and 732 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 01:39:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:24,685 INFO L93 Difference]: Finished difference Result 1009 states and 1743 transitions. [2021-11-07 01:39:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:24,686 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 01:39:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:24,692 INFO L225 Difference]: With dead ends: 1009 [2021-11-07 01:39:24,693 INFO L226 Difference]: Without dead ends: 824 [2021-11-07 01:39:24,694 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 01:39:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-11-07 01:39:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 639. [2021-11-07 01:39:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 637 states have (on average 1.7629513343799057) internal successors, (1123), 638 states have internal predecessors, (1123), 0 states have call successors, (0), 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 01:39:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1123 transitions. [2021-11-07 01:39:24,761 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1123 transitions. Word has length 54 [2021-11-07 01:39:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:24,762 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1123 transitions. [2021-11-07 01:39:24,762 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 01:39:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1123 transitions. [2021-11-07 01:39:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:39:24,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:24,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:24,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:24,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:24,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash 67166174, now seen corresponding path program 1 times [2021-11-07 01:39:24,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:24,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816771580] [2021-11-07 01:39:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:24,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:24,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:24,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:24,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:39:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:25,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:25,737 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 01:39:25,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:25,939 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 01:39:25,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:25,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816771580] [2021-11-07 01:39:25,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816771580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:25,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:25,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:25,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137255859] [2021-11-07 01:39:25,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:25,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:25,942 INFO L87 Difference]: Start difference. First operand 639 states and 1123 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:39:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:26,048 INFO L93 Difference]: Finished difference Result 1541 states and 2717 transitions. [2021-11-07 01:39:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:39:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:26,057 INFO L225 Difference]: With dead ends: 1541 [2021-11-07 01:39:26,057 INFO L226 Difference]: Without dead ends: 986 [2021-11-07 01:39:26,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:39:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-11-07 01:39:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 801. [2021-11-07 01:39:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 799 states have (on average 1.7734668335419275) internal successors, (1417), 800 states have internal predecessors, (1417), 0 states have call successors, (0), 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 01:39:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1417 transitions. [2021-11-07 01:39:26,145 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1417 transitions. Word has length 66 [2021-11-07 01:39:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:26,146 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1417 transitions. [2021-11-07 01:39:26,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 01:39:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1417 transitions. [2021-11-07 01:39:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:39:26,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:26,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:26,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:26,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:26,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 430457759, now seen corresponding path program 1 times [2021-11-07 01:39:26,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:26,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519058051] [2021-11-07 01:39:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:26,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:26,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:26,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:39:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:27,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:27,436 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 01:39:27,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:27,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519058051] [2021-11-07 01:39:27,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519058051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:27,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363731732] [2021-11-07 01:39:27,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:27,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:27,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:27,439 INFO L87 Difference]: Start difference. First operand 801 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:39:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:27,577 INFO L93 Difference]: Finished difference Result 2059 states and 3664 transitions. [2021-11-07 01:39:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:39:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:27,589 INFO L225 Difference]: With dead ends: 2059 [2021-11-07 01:39:27,589 INFO L226 Difference]: Without dead ends: 1350 [2021-11-07 01:39:27,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:39:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-07 01:39:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1165. [2021-11-07 01:39:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1163 states have (on average 1.7893379191745487) internal successors, (2081), 1164 states have internal predecessors, (2081), 0 states have call successors, (0), 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 01:39:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2081 transitions. [2021-11-07 01:39:27,722 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2081 transitions. Word has length 67 [2021-11-07 01:39:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:27,723 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2081 transitions. [2021-11-07 01:39:27,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 01:39:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2081 transitions. [2021-11-07 01:39:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:39:27,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:27,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:27,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:27,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:27,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2029886704, now seen corresponding path program 1 times [2021-11-07 01:39:27,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:27,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750549018] [2021-11-07 01:39:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:27,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:27,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:39:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:28,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:28,780 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 01:39:28,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:28,993 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 01:39:28,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:28,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750549018] [2021-11-07 01:39:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750549018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:28,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:28,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:28,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76221498] [2021-11-07 01:39:28,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:28,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:28,996 INFO L87 Difference]: Start difference. First operand 1165 states and 2081 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:29,223 INFO L93 Difference]: Finished difference Result 3131 states and 5625 transitions. [2021-11-07 01:39:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:39:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:29,240 INFO L225 Difference]: With dead ends: 3131 [2021-11-07 01:39:29,241 INFO L226 Difference]: Without dead ends: 2066 [2021-11-07 01:39:29,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:39:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-11-07 01:39:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1881. [2021-11-07 01:39:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1879 states have (on average 1.8030867482703565) internal successors, (3388), 1880 states have internal predecessors, (3388), 0 states have call successors, (0), 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 01:39:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3388 transitions. [2021-11-07 01:39:29,456 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3388 transitions. Word has length 68 [2021-11-07 01:39:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:29,457 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 3388 transitions. [2021-11-07 01:39:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3388 transitions. [2021-11-07 01:39:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:39:29,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:29,464 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 01:39:29,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:29,682 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1514647696, now seen corresponding path program 1 times [2021-11-07 01:39:29,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:29,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474461050] [2021-11-07 01:39:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:29,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:29,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:29,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:39:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:30,518 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 01:39:30,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:30,726 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 01:39:30,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:30,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474461050] [2021-11-07 01:39:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474461050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:30,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:30,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:30,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765448293] [2021-11-07 01:39:30,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:30,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:30,728 INFO L87 Difference]: Start difference. First operand 1881 states and 3388 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 01:39:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:30,990 INFO L93 Difference]: Finished difference Result 5015 states and 9065 transitions. [2021-11-07 01:39:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:30,991 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 01:39:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:31,028 INFO L225 Difference]: With dead ends: 5015 [2021-11-07 01:39:31,028 INFO L226 Difference]: Without dead ends: 3268 [2021-11-07 01:39:31,032 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 01:39:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-11-07 01:39:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 3083. [2021-11-07 01:39:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3081 states have (on average 1.8101265822784811) internal successors, (5577), 3082 states have internal predecessors, (5577), 0 states have call successors, (0), 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 01:39:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 5577 transitions. [2021-11-07 01:39:31,334 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 5577 transitions. Word has length 69 [2021-11-07 01:39:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:31,335 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 5577 transitions. [2021-11-07 01:39:31,335 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 01:39:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 5577 transitions. [2021-11-07 01:39:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:39:31,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:31,344 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:31,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:31,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:31,565 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2132569825, now seen corresponding path program 1 times [2021-11-07 01:39:31,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:31,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168042043] [2021-11-07 01:39:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:31,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:31,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:31,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:39:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:32,430 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 01:39:32,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:32,662 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 01:39:32,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168042043] [2021-11-07 01:39:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168042043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:32,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:32,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:32,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363302846] [2021-11-07 01:39:32,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:32,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:32,666 INFO L87 Difference]: Start difference. First operand 3083 states and 5577 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 01:39:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:33,098 INFO L93 Difference]: Finished difference Result 8337 states and 15115 transitions. [2021-11-07 01:39:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:33,099 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 01:39:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:33,143 INFO L225 Difference]: With dead ends: 8337 [2021-11-07 01:39:33,143 INFO L226 Difference]: Without dead ends: 5422 [2021-11-07 01:39:33,149 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 01:39:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5422 states. [2021-11-07 01:39:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5422 to 5237. [2021-11-07 01:39:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5237 states, 5235 states have (on average 1.8127984718242598) internal successors, (9490), 5236 states have internal predecessors, (9490), 0 states have call successors, (0), 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 01:39:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 9490 transitions. [2021-11-07 01:39:33,667 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 9490 transitions. Word has length 70 [2021-11-07 01:39:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:33,669 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 9490 transitions. [2021-11-07 01:39:33,669 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 01:39:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 9490 transitions. [2021-11-07 01:39:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:39:33,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:33,676 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:33,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:33,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:33,895 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1013040961, now seen corresponding path program 1 times [2021-11-07 01:39:33,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:33,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539991665] [2021-11-07 01:39:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:33,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:33,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:33,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:39:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:34,931 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 01:39:34,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:35,136 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 01:39:35,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539991665] [2021-11-07 01:39:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539991665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:35,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:35,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:35,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219585856] [2021-11-07 01:39:35,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:35,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:35,139 INFO L87 Difference]: Start difference. First operand 5237 states and 9490 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 01:39:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:35,936 INFO L93 Difference]: Finished difference Result 15257 states and 27696 transitions. [2021-11-07 01:39:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:35,937 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 01:39:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:36,021 INFO L225 Difference]: With dead ends: 15257 [2021-11-07 01:39:36,022 INFO L226 Difference]: Without dead ends: 10192 [2021-11-07 01:39:36,032 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 01:39:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10192 states. [2021-11-07 01:39:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10192 to 10007. [2021-11-07 01:39:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10005 states have (on average 1.813793103448276) internal successors, (18147), 10006 states have internal predecessors, (18147), 0 states have call successors, (0), 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 01:39:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 18147 transitions. [2021-11-07 01:39:37,017 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 18147 transitions. Word has length 71 [2021-11-07 01:39:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:37,018 INFO L470 AbstractCegarLoop]: Abstraction has 10007 states and 18147 transitions. [2021-11-07 01:39:37,019 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 01:39:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 18147 transitions. [2021-11-07 01:39:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:39:37,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:37,032 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] [2021-11-07 01:39:37,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:37,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,252 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash 806300399, now seen corresponding path program 1 times [2021-11-07 01:39:37,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:37,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541024416] [2021-11-07 01:39:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:37,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:37,256 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:37,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:39:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:38,478 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 01:39:38,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:38,747 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 01:39:38,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:38,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541024416] [2021-11-07 01:39:38,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541024416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:38,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:38,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:38,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713665164] [2021-11-07 01:39:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:38,750 INFO L87 Difference]: Start difference. First operand 10007 states and 18147 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 01:39:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:41,889 INFO L93 Difference]: Finished difference Result 24652 states and 44720 transitions. [2021-11-07 01:39:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 01:39:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:41,941 INFO L225 Difference]: With dead ends: 24652 [2021-11-07 01:39:41,941 INFO L226 Difference]: Without dead ends: 14895 [2021-11-07 01:39:41,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 01:39:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14895 states. [2021-11-07 01:39:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14895 to 9974. [2021-11-07 01:39:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9974 states, 9972 states have (on average 1.8065583634175693) internal successors, (18015), 9973 states have internal predecessors, (18015), 0 states have call successors, (0), 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 01:39:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9974 states to 9974 states and 18015 transitions. [2021-11-07 01:39:42,768 INFO L78 Accepts]: Start accepts. Automaton has 9974 states and 18015 transitions. Word has length 72 [2021-11-07 01:39:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 9974 states and 18015 transitions. [2021-11-07 01:39:42,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 01:39:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 9974 states and 18015 transitions. [2021-11-07 01:39:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:39:42,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:42,778 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 01:39:42,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:42,999 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1787766736, now seen corresponding path program 1 times [2021-11-07 01:39:43,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:43,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399503885] [2021-11-07 01:39:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:43,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:43,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:43,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:39:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:44,238 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 01:39:44,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:44,441 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 01:39:44,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:44,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399503885] [2021-11-07 01:39:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399503885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:44,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:44,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976365507] [2021-11-07 01:39:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:44,444 INFO L87 Difference]: Start difference. First operand 9974 states and 18015 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 01:39:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:45,422 INFO L93 Difference]: Finished difference Result 29172 states and 52754 transitions. [2021-11-07 01:39:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:45,423 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 01:39:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:45,491 INFO L225 Difference]: With dead ends: 29172 [2021-11-07 01:39:45,491 INFO L226 Difference]: Without dead ends: 19377 [2021-11-07 01:39:45,509 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 01:39:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19377 states. [2021-11-07 01:39:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19377 to 19192. [2021-11-07 01:39:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19192 states, 19190 states have (on average 1.805940594059406) internal successors, (34656), 19191 states have internal predecessors, (34656), 0 states have call successors, (0), 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 01:39:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19192 states to 19192 states and 34656 transitions. [2021-11-07 01:39:46,737 INFO L78 Accepts]: Start accepts. Automaton has 19192 states and 34656 transitions. Word has length 72 [2021-11-07 01:39:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:46,738 INFO L470 AbstractCegarLoop]: Abstraction has 19192 states and 34656 transitions. [2021-11-07 01:39:46,738 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 01:39:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19192 states and 34656 transitions. [2021-11-07 01:39:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:39:46,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:46,751 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 01:39:46,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:46,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:46,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash 182010301, now seen corresponding path program 1 times [2021-11-07 01:39:46,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:46,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872327273] [2021-11-07 01:39:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:46,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:46,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:46,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:39:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:48,060 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 01:39:48,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:48,284 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 01:39:48,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:48,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872327273] [2021-11-07 01:39:48,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872327273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:48,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:48,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996592019] [2021-11-07 01:39:48,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:48,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:48,291 INFO L87 Difference]: Start difference. First operand 19192 states and 34656 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 01:39:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:50,240 INFO L93 Difference]: Finished difference Result 57012 states and 102991 transitions. [2021-11-07 01:39:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:50,241 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 01:39:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:50,347 INFO L225 Difference]: With dead ends: 57012 [2021-11-07 01:39:50,347 INFO L226 Difference]: Without dead ends: 38003 [2021-11-07 01:39:50,379 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 01:39:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38003 states. [2021-11-07 01:39:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38003 to 37818. [2021-11-07 01:39:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37818 states, 37816 states have (on average 1.803284324095621) internal successors, (68193), 37817 states have internal predecessors, (68193), 0 states have call successors, (0), 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 01:39:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37818 states to 37818 states and 68193 transitions. [2021-11-07 01:39:52,802 INFO L78 Accepts]: Start accepts. Automaton has 37818 states and 68193 transitions. Word has length 73 [2021-11-07 01:39:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:52,802 INFO L470 AbstractCegarLoop]: Abstraction has 37818 states and 68193 transitions. [2021-11-07 01:39:52,803 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 01:39:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37818 states and 68193 transitions. [2021-11-07 01:39:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:39:52,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:52,818 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] [2021-11-07 01:39:52,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:53,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:53,038 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 103511145, now seen corresponding path program 1 times [2021-11-07 01:39:53,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:53,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842772672] [2021-11-07 01:39:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:53,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:53,041 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:53,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:39:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:54,118 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 01:39:54,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:54,433 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 01:39:54,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:54,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842772672] [2021-11-07 01:39:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842772672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:54,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:54,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:54,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836822270] [2021-11-07 01:39:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:54,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:54,437 INFO L87 Difference]: Start difference. First operand 37818 states and 68193 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:02,288 INFO L93 Difference]: Finished difference Result 146681 states and 264340 transitions. [2021-11-07 01:40:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:02,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:40:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:02,648 INFO L225 Difference]: With dead ends: 146681 [2021-11-07 01:40:02,648 INFO L226 Difference]: Without dead ends: 109112 [2021-11-07 01:40:02,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 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 01:40:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109112 states. [2021-11-07 01:40:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109112 to 37560. [2021-11-07 01:40:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37560 states, 37558 states have (on average 1.7881942595452367) internal successors, (67161), 37559 states have internal predecessors, (67161), 0 states have call successors, (0), 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 01:40:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37560 states to 37560 states and 67161 transitions. [2021-11-07 01:40:06,271 INFO L78 Accepts]: Start accepts. Automaton has 37560 states and 67161 transitions. Word has length 74 [2021-11-07 01:40:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:06,271 INFO L470 AbstractCegarLoop]: Abstraction has 37560 states and 67161 transitions. [2021-11-07 01:40:06,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37560 states and 67161 transitions. [2021-11-07 01:40:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:40:06,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:06,285 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] [2021-11-07 01:40:06,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:06,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:06,505 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1490416395, now seen corresponding path program 1 times [2021-11-07 01:40:06,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:06,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959326415] [2021-11-07 01:40:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:06,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:06,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:06,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:40:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:07,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:07,643 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 01:40:07,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:07,852 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 01:40:07,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:07,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959326415] [2021-11-07 01:40:07,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959326415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:07,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:07,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:07,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815469720] [2021-11-07 01:40:07,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:07,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:07,855 INFO L87 Difference]: Start difference. First operand 37560 states and 67161 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:10,169 INFO L93 Difference]: Finished difference Result 75050 states and 134211 transitions. [2021-11-07 01:40:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:40:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:10,237 INFO L225 Difference]: With dead ends: 75050 [2021-11-07 01:40:10,237 INFO L226 Difference]: Without dead ends: 37745 [2021-11-07 01:40:10,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 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 01:40:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37745 states. [2021-11-07 01:40:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37745 to 37560. [2021-11-07 01:40:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37560 states, 37558 states have (on average 1.7847861973481016) internal successors, (67033), 37559 states have internal predecessors, (67033), 0 states have call successors, (0), 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 01:40:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37560 states to 37560 states and 67033 transitions. [2021-11-07 01:40:12,852 INFO L78 Accepts]: Start accepts. Automaton has 37560 states and 67033 transitions. Word has length 74 [2021-11-07 01:40:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:12,853 INFO L470 AbstractCegarLoop]: Abstraction has 37560 states and 67033 transitions. [2021-11-07 01:40:12,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 37560 states and 67033 transitions. [2021-11-07 01:40:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:40:12,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:12,861 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 01:40:12,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:13,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,061 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash -73319106, now seen corresponding path program 1 times [2021-11-07 01:40:13,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:13,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152085024] [2021-11-07 01:40:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:13,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:13,064 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:13,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:40:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:14,152 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 01:40:14,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:14,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:14,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152085024] [2021-11-07 01:40:14,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152085024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:14,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837390623] [2021-11-07 01:40:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:14,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:14,371 INFO L87 Difference]: Start difference. First operand 37560 states and 67033 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 01:40:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:18,106 INFO L93 Difference]: Finished difference Result 104276 states and 185741 transitions. [2021-11-07 01:40:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:18,107 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 01:40:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:18,235 INFO L225 Difference]: With dead ends: 104276 [2021-11-07 01:40:18,235 INFO L226 Difference]: Without dead ends: 66931 [2021-11-07 01:40:18,260 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 01:40:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66931 states. [2021-11-07 01:40:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66931 to 66746. [2021-11-07 01:40:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66746 states, 66744 states have (on average 1.7752906628311158) internal successors, (118490), 66745 states have internal predecessors, (118490), 0 states have call successors, (0), 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 01:40:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66746 states to 66746 states and 118490 transitions. [2021-11-07 01:40:22,777 INFO L78 Accepts]: Start accepts. Automaton has 66746 states and 118490 transitions. Word has length 74 [2021-11-07 01:40:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:22,778 INFO L470 AbstractCegarLoop]: Abstraction has 66746 states and 118490 transitions. [2021-11-07 01:40:22,778 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 01:40:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 66746 states and 118490 transitions. [2021-11-07 01:40:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:40:22,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:22,787 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] [2021-11-07 01:40:22,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:23,007 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:40:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 178263173, now seen corresponding path program 1 times [2021-11-07 01:40:23,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:23,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390603719] [2021-11-07 01:40:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:23,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:23,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:23,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:40:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:23,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:24,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:24,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:24,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390603719] [2021-11-07 01:40:24,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390603719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:24,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633301268] [2021-11-07 01:40:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:24,436 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:24,447 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:24,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_482cf7bb-a7dc-4c84-bc59-8b5307850e7e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:40:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:26,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:26,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1633301268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:26,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:26,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:40:26,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856549467] [2021-11-07 01:40:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:40:26,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:26,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:40:26,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:40:26,422 INFO L87 Difference]: Start difference. First operand 66746 states and 118490 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)