./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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 ee2b8c4c449b1e8aa7dd92109d118d4c0b36a93d6052f04f0a75223fa59783b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:30,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:30,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:30,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:30,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:30,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:30,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:30,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:30,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:30,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:30,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:30,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:30,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:30,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:30,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:30,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:30,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:30,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:30,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:30,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:30,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:30,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:30,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:30,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:30,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:30,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:30,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:30,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:30,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:30,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:30,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:30,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:30,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:30,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:30,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:30,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:30,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:30,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:30,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:30,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:30,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:30,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:24:30,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:30,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:30,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:30,967 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:30,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:30,967 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:30,967 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:24:30,967 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:30,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:30,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:24:30,969 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:24:30,969 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:30,969 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:24:30,970 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:24:30,970 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:24:30,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:30,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:30,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:24:30,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:30,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:30,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:24:30,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:30,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:24:30,972 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:30,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:30,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:24:30,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:30,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:24:30,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:30,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:30,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:30,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:30,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:30,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:24:30,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:24:30,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:24:30,977 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:24:30,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:30,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:30,978 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee2b8c4c449b1e8aa7dd92109d118d4c0b36a93d6052f04f0a75223fa59783b7 [2021-11-07 02:24:31,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:31,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:31,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:31,336 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:31,336 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:31,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product32.cil.c [2021-11-07 02:24:31,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/b428259f3/9e970955ce164fa69e938f7d5fef11df/FLAGd8113efd6 [2021-11-07 02:24:32,101 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:32,102 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c [2021-11-07 02:24:32,135 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/b428259f3/9e970955ce164fa69e938f7d5fef11df/FLAGd8113efd6 [2021-11-07 02:24:32,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/b428259f3/9e970955ce164fa69e938f7d5fef11df [2021-11-07 02:24:32,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:32,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:32,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:32,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:32,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:32,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:32" (1/1) ... [2021-11-07 02:24:32,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd9430f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:32, skipping insertion in model container [2021-11-07 02:24:32,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:32" (1/1) ... [2021-11-07 02:24:32,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:32,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:32,698 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c[6103,6116] [2021-11-07 02:24:33,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:33,015 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:24:33,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62740ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:33, skipping insertion in model container [2021-11-07 02:24:33,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:33,017 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:24:33,019 INFO L168 Benchmark]: Toolchain (without parser) took 735.52 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 46.2 MB in the beginning and 73.0 MB in the end (delta: -26.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:33,020 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 54.6 MB in the beginning and 54.6 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:24:33,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.08 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 46.0 MB in the beginning and 73.0 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:33,023 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 54.6 MB in the beginning and 54.6 MB in the end (delta: 30.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.08 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 46.0 MB in the beginning and 73.0 MB in the end (delta: -26.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1134]: 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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 ee2b8c4c449b1e8aa7dd92109d118d4c0b36a93d6052f04f0a75223fa59783b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:35,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:35,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:35,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:35,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:35,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:35,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:35,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:35,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:35,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:35,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:35,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:35,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:35,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:35,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:35,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:35,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:35,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:35,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:35,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:35,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:35,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:35,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:35,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:35,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:35,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:35,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:35,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:35,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:35,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:35,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:35,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:35,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:35,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:35,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:35,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:35,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:35,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:35,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:35,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:35,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:35,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:24:35,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:35,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:35,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:35,308 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:35,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:35,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:35,309 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:35,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:35,309 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:35,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:35,311 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:35,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:35,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:35,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:24:35,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:35,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:24:35,312 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:35,312 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:24:35,312 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:24:35,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:35,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:24:35,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:35,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:24:35,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:35,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:24:35,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:35,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:35,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:35,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:35,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:24:35,316 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:24:35,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:35,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:24:35,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:35,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:35,317 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee2b8c4c449b1e8aa7dd92109d118d4c0b36a93d6052f04f0a75223fa59783b7 [2021-11-07 02:24:35,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:35,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:35,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:35,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:35,761 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:35,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product32.cil.c [2021-11-07 02:24:35,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/fd3aa1874/41fc9ca89a7e4d5182a5f579ed2929c7/FLAG31babeb53 [2021-11-07 02:24:36,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:36,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c [2021-11-07 02:24:36,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/fd3aa1874/41fc9ca89a7e4d5182a5f579ed2929c7/FLAG31babeb53 [2021-11-07 02:24:36,791 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/data/fd3aa1874/41fc9ca89a7e4d5182a5f579ed2929c7 [2021-11-07 02:24:36,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:36,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:36,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:36,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:36,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:36,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:36" (1/1) ... [2021-11-07 02:24:36,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b2a71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:36, skipping insertion in model container [2021-11-07 02:24:36,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:36" (1/1) ... [2021-11-07 02:24:36,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:36,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:37,110 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c[6103,6116] [2021-11-07 02:24:37,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:37,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:24:37,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:37,571 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c[6103,6116] [2021-11-07 02:24:37,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:37,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:24:37,729 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_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/sv-benchmarks/c/product-lines/email_spec7_product32.cil.c[6103,6116] [2021-11-07 02:24:37,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:37,894 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:24:37,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37 WrapperNode [2021-11-07 02:24:37,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:37,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:24:37,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:24:37,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:24:37,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:37,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:24:38,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:24:38,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:24:38,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:24:38,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:24:38,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:24:38,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:24:38,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:24:38,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (1/1) ... [2021-11-07 02:24:38,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:38,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:24:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:24:38,481 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:24:38,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:24:38,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:24:38,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:24:38,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:24:44,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:24:44,381 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 02:24:44,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:44 BoogieIcfgContainer [2021-11-07 02:24:44,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:24:44,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:24:44,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:24:44,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:24:44,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:24:36" (1/3) ... [2021-11-07 02:24:44,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6010c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:44, skipping insertion in model container [2021-11-07 02:24:44,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:37" (2/3) ... [2021-11-07 02:24:44,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6010c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:44, skipping insertion in model container [2021-11-07 02:24:44,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:44" (3/3) ... [2021-11-07 02:24:44,393 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product32.cil.c [2021-11-07 02:24:44,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:24:44,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:24:44,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:24:44,464 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:24:44,464 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:24:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 1068 states, 1061 states have (on average 1.7492931196983978) internal successors, (1856), 1067 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:24:44,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:44,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:44,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:44,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 348329899, now seen corresponding path program 1 times [2021-11-07 02:24:44,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:44,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87673191] [2021-11-07 02:24:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:44,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:44,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:44,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:24:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:24:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:45,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:45,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:45,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87673191] [2021-11-07 02:24:45,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87673191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:45,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:45,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:24:45,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795653410] [2021-11-07 02:24:45,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:24:45,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:24:45,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:24:45,523 INFO L87 Difference]: Start difference. First operand has 1068 states, 1061 states have (on average 1.7492931196983978) internal successors, (1856), 1067 states have internal predecessors, (1856), 0 states have call successors, (0), 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 27.5) internal successors, (55), 2 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 02:24:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:45,633 INFO L93 Difference]: Finished difference Result 1851 states and 3189 transitions. [2021-11-07 02:24:45,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:24:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 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 55 [2021-11-07 02:24:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:45,665 INFO L225 Difference]: With dead ends: 1851 [2021-11-07 02:24:45,666 INFO L226 Difference]: Without dead ends: 966 [2021-11-07 02:24:45,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:24:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-07 02:24:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2021-11-07 02:24:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 960 states have (on average 1.7447916666666667) internal successors, (1675), 965 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1675 transitions. [2021-11-07 02:24:45,808 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1675 transitions. Word has length 55 [2021-11-07 02:24:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:45,808 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1675 transitions. [2021-11-07 02:24:45,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 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 02:24:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1675 transitions. [2021-11-07 02:24:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:24:45,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:45,819 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] [2021-11-07 02:24:45,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:46,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:46,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:46,045 INFO L85 PathProgramCache]: Analyzing trace with hash 600835443, now seen corresponding path program 1 times [2021-11-07 02:24:46,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:46,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716971044] [2021-11-07 02:24:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:46,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:46,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:46,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:46,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:24:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:24:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:46,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:46,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716971044] [2021-11-07 02:24:46,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716971044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:46,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:46,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:46,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134307077] [2021-11-07 02:24:46,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:46,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:46,878 INFO L87 Difference]: Start difference. First operand 966 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 02:24:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:47,066 INFO L93 Difference]: Finished difference Result 2868 states and 4977 transitions. [2021-11-07 02:24:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 56 [2021-11-07 02:24:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:47,085 INFO L225 Difference]: With dead ends: 2868 [2021-11-07 02:24:47,085 INFO L226 Difference]: Without dead ends: 1917 [2021-11-07 02:24:47,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-07 02:24:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 965. [2021-11-07 02:24:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 959 states have (on average 1.7413972888425444) internal successors, (1670), 964 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1670 transitions. [2021-11-07 02:24:47,146 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1670 transitions. Word has length 56 [2021-11-07 02:24:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:47,147 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1670 transitions. [2021-11-07 02:24:47,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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 02:24:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1670 transitions. [2021-11-07 02:24:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:24:47,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:47,157 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] [2021-11-07 02:24:47,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:47,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:47,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:47,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1773149363, now seen corresponding path program 1 times [2021-11-07 02:24:47,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:47,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001952358] [2021-11-07 02:24:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:47,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:47,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:47,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:24:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:47,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:48,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:48,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001952358] [2021-11-07 02:24:48,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001952358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:48,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:48,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:48,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518042446] [2021-11-07 02:24:48,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:48,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:48,238 INFO L87 Difference]: Start difference. First operand 965 states and 1670 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:48,629 INFO L93 Difference]: Finished difference Result 3777 states and 6542 transitions. [2021-11-07 02:24:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:24:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 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 58 [2021-11-07 02:24:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:48,647 INFO L225 Difference]: With dead ends: 3777 [2021-11-07 02:24:48,647 INFO L226 Difference]: Without dead ends: 2830 [2021-11-07 02:24:48,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:24:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2021-11-07 02:24:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 964. [2021-11-07 02:24:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 958 states have (on average 1.7390396659707725) internal successors, (1666), 963 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1666 transitions. [2021-11-07 02:24:48,732 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1666 transitions. Word has length 58 [2021-11-07 02:24:48,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:48,733 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1666 transitions. [2021-11-07 02:24:48,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1666 transitions. [2021-11-07 02:24:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:24:48,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:48,736 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] [2021-11-07 02:24:48,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:48,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:48,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1775135654, now seen corresponding path program 1 times [2021-11-07 02:24:48,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:48,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223417160] [2021-11-07 02:24:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:48,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:48,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:24:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:24:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:49,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:49,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:49,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223417160] [2021-11-07 02:24:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223417160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:49,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:49,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:49,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122763972] [2021-11-07 02:24:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:49,779 INFO L87 Difference]: Start difference. First operand 964 states and 1666 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:49,908 INFO L93 Difference]: Finished difference Result 1925 states and 3329 transitions. [2021-11-07 02:24:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 59 [2021-11-07 02:24:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:49,916 INFO L225 Difference]: With dead ends: 1925 [2021-11-07 02:24:49,916 INFO L226 Difference]: Without dead ends: 969 [2021-11-07 02:24:49,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-07 02:24:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 964. [2021-11-07 02:24:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 958 states have (on average 1.7359081419624216) internal successors, (1663), 963 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1663 transitions. [2021-11-07 02:24:49,983 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1663 transitions. Word has length 59 [2021-11-07 02:24:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:49,984 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1663 transitions. [2021-11-07 02:24:49,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1663 transitions. [2021-11-07 02:24:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:24:49,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:49,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:50,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 02:24:50,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:50,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:50,201 INFO L85 PathProgramCache]: Analyzing trace with hash -306326683, now seen corresponding path program 1 times [2021-11-07 02:24:50,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:50,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930673795] [2021-11-07 02:24:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:50,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:50,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:50,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:50,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:24:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:50,815 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 02:24:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:51,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:51,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930673795] [2021-11-07 02:24:51,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930673795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:51,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:51,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:51,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309030139] [2021-11-07 02:24:51,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:51,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:51,013 INFO L87 Difference]: Start difference. First operand 964 states and 1663 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 02:24:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:51,403 INFO L93 Difference]: Finished difference Result 3764 states and 6518 transitions. [2021-11-07 02:24:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:24:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 60 [2021-11-07 02:24:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:51,421 INFO L225 Difference]: With dead ends: 3764 [2021-11-07 02:24:51,421 INFO L226 Difference]: Without dead ends: 2826 [2021-11-07 02:24:51,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 02:24:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-11-07 02:24:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 964. [2021-11-07 02:24:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 958 states have (on average 1.732776617954071) internal successors, (1660), 963 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:51,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1660 transitions. [2021-11-07 02:24:51,520 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1660 transitions. Word has length 60 [2021-11-07 02:24:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:51,521 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1660 transitions. [2021-11-07 02:24:51,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 02:24:51,521 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1660 transitions. [2021-11-07 02:24:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:24:51,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:51,523 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] [2021-11-07 02:24:51,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:51,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:51,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1515732470, now seen corresponding path program 1 times [2021-11-07 02:24:51,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:51,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778091400] [2021-11-07 02:24:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:51,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:51,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:51,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:24:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:52,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:52,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:52,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778091400] [2021-11-07 02:24:52,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778091400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:52,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:52,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:52,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692343977] [2021-11-07 02:24:52,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:52,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:52,542 INFO L87 Difference]: Start difference. First operand 964 states and 1660 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:52,707 INFO L93 Difference]: Finished difference Result 2583 states and 4445 transitions. [2021-11-07 02:24:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:24:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:52,720 INFO L225 Difference]: With dead ends: 2583 [2021-11-07 02:24:52,720 INFO L226 Difference]: Without dead ends: 1902 [2021-11-07 02:24:52,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-11-07 02:24:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1221. [2021-11-07 02:24:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1215 states have (on average 1.7555555555555555) internal successors, (2133), 1220 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2133 transitions. [2021-11-07 02:24:52,841 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2133 transitions. Word has length 62 [2021-11-07 02:24:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2133 transitions. [2021-11-07 02:24:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2133 transitions. [2021-11-07 02:24:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:24:52,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:52,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:52,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:53,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:53,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1939397529, now seen corresponding path program 1 times [2021-11-07 02:24:53,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:53,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60827214] [2021-11-07 02:24:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:53,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:53,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:53,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:24:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:53,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:53,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:53,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:53,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60827214] [2021-11-07 02:24:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60827214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:53,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:53,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:53,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435089946] [2021-11-07 02:24:53,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:53,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:53,974 INFO L87 Difference]: Start difference. First operand 1221 states and 2133 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 02:24:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:54,150 INFO L93 Difference]: Finished difference Result 3244 states and 5665 transitions. [2021-11-07 02:24:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:54,151 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 02:24:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:54,164 INFO L225 Difference]: With dead ends: 3244 [2021-11-07 02:24:54,164 INFO L226 Difference]: Without dead ends: 2107 [2021-11-07 02:24:54,167 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 02:24:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-11-07 02:24:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1426. [2021-11-07 02:24:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1420 states have (on average 1.7669014084507042) internal successors, (2509), 1425 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2509 transitions. [2021-11-07 02:24:54,307 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2509 transitions. Word has length 74 [2021-11-07 02:24:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:54,310 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 2509 transitions. [2021-11-07 02:24:54,310 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 02:24:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2509 transitions. [2021-11-07 02:24:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:24:54,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:54,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:54,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:24:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:54,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 818212442, now seen corresponding path program 1 times [2021-11-07 02:24:54,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:54,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508209336] [2021-11-07 02:24:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:54,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:54,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:24:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:55,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:55,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:55,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508209336] [2021-11-07 02:24:55,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508209336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:55,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:55,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:55,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939647076] [2021-11-07 02:24:55,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:55,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:55,414 INFO L87 Difference]: Start difference. First operand 1426 states and 2509 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:55,628 INFO L93 Difference]: Finished difference Result 3891 states and 6858 transitions. [2021-11-07 02:24:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:24:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:55,644 INFO L225 Difference]: With dead ends: 3891 [2021-11-07 02:24:55,644 INFO L226 Difference]: Without dead ends: 2557 [2021-11-07 02:24:55,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-11-07 02:24:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1876. [2021-11-07 02:24:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1870 states have (on average 1.7844919786096256) internal successors, (3337), 1875 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3337 transitions. [2021-11-07 02:24:55,798 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3337 transitions. Word has length 75 [2021-11-07 02:24:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 3337 transitions. [2021-11-07 02:24:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3337 transitions. [2021-11-07 02:24:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:24:55,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:55,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:55,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:56,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:56,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash 525887147, now seen corresponding path program 1 times [2021-11-07 02:24:56,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:56,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852246960] [2021-11-07 02:24:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:56,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:56,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:56,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:24:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:56,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:56,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:56,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852246960] [2021-11-07 02:24:56,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852246960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:56,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:56,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:56,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636984994] [2021-11-07 02:24:56,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:56,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:56,937 INFO L87 Difference]: Start difference. First operand 1876 states and 3337 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:57,164 INFO L93 Difference]: Finished difference Result 5221 states and 9311 transitions. [2021-11-07 02:24:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:24:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:57,186 INFO L225 Difference]: With dead ends: 5221 [2021-11-07 02:24:57,186 INFO L226 Difference]: Without dead ends: 3445 [2021-11-07 02:24:57,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-11-07 02:24:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2764. [2021-11-07 02:24:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2758 states have (on average 1.8027556200145032) internal successors, (4972), 2763 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 4972 transitions. [2021-11-07 02:24:57,423 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 4972 transitions. Word has length 76 [2021-11-07 02:24:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:57,423 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 4972 transitions. [2021-11-07 02:24:57,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 4972 transitions. [2021-11-07 02:24:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:24:57,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:57,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:57,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:57,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1451714261, now seen corresponding path program 1 times [2021-11-07 02:24:57,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:57,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838838587] [2021-11-07 02:24:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:57,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:57,647 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:24:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:58,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:58,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:58,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838838587] [2021-11-07 02:24:58,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838838587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:58,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:58,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:58,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916885291] [2021-11-07 02:24:58,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:58,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:58,607 INFO L87 Difference]: Start difference. First operand 2764 states and 4972 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:58,910 INFO L93 Difference]: Finished difference Result 7621 states and 13735 transitions. [2021-11-07 02:24:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:24:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:58,954 INFO L225 Difference]: With dead ends: 7621 [2021-11-07 02:24:58,955 INFO L226 Difference]: Without dead ends: 4991 [2021-11-07 02:24:58,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:58,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-11-07 02:24:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4310. [2021-11-07 02:24:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 4304 states have (on average 1.816217472118959) internal successors, (7817), 4309 states have internal predecessors, (7817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 7817 transitions. [2021-11-07 02:24:59,291 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 7817 transitions. Word has length 77 [2021-11-07 02:24:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:59,292 INFO L470 AbstractCegarLoop]: Abstraction has 4310 states and 7817 transitions. [2021-11-07 02:24:59,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 7817 transitions. [2021-11-07 02:24:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:24:59,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:59,302 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:59,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:24:59,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:59,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash -459621414, now seen corresponding path program 1 times [2021-11-07 02:24:59,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:59,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1175845202] [2021-11-07 02:24:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:59,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:59,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:59,524 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:25:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:00,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:00,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:00,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1175845202] [2021-11-07 02:25:00,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1175845202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:00,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:00,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:00,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698471308] [2021-11-07 02:25:00,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:25:00,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:25:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:00,584 INFO L87 Difference]: Start difference. First operand 4310 states and 7817 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:00,984 INFO L93 Difference]: Finished difference Result 11975 states and 21753 transitions. [2021-11-07 02:25:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:25:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 02:25:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:01,008 INFO L225 Difference]: With dead ends: 11975 [2021-11-07 02:25:01,008 INFO L226 Difference]: Without dead ends: 7833 [2021-11-07 02:25:01,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-11-07 02:25:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 7152. [2021-11-07 02:25:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7146 states have (on average 1.8250769661349007) internal successors, (13042), 7151 states have internal predecessors, (13042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 13042 transitions. [2021-11-07 02:25:01,490 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 13042 transitions. Word has length 78 [2021-11-07 02:25:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:01,491 INFO L470 AbstractCegarLoop]: Abstraction has 7152 states and 13042 transitions. [2021-11-07 02:25:01,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 13042 transitions. [2021-11-07 02:25:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:25:01,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:01,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:01,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:01,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:01,717 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash 478397306, now seen corresponding path program 1 times [2021-11-07 02:25:01,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:01,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093274292] [2021-11-07 02:25:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:01,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:01,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:01,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:25:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:02,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:02,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:02,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093274292] [2021-11-07 02:25:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093274292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:02,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911701409] [2021-11-07 02:25:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:25:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:25:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:02,704 INFO L87 Difference]: Start difference. First operand 7152 states and 13042 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:03,271 INFO L93 Difference]: Finished difference Result 20959 states and 38270 transitions. [2021-11-07 02:25:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:25:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-07 02:25:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:03,308 INFO L225 Difference]: With dead ends: 20959 [2021-11-07 02:25:03,309 INFO L226 Difference]: Without dead ends: 13979 [2021-11-07 02:25:03,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13979 states. [2021-11-07 02:25:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13979 to 13298. [2021-11-07 02:25:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13298 states, 13292 states have (on average 1.829897682816732) internal successors, (24323), 13297 states have internal predecessors, (24323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13298 states to 13298 states and 24323 transitions. [2021-11-07 02:25:04,097 INFO L78 Accepts]: Start accepts. Automaton has 13298 states and 24323 transitions. Word has length 79 [2021-11-07 02:25:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:04,098 INFO L470 AbstractCegarLoop]: Abstraction has 13298 states and 24323 transitions. [2021-11-07 02:25:04,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13298 states and 24323 transitions. [2021-11-07 02:25:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:25:04,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:04,115 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:04,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:04,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:04,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 876328810, now seen corresponding path program 1 times [2021-11-07 02:25:04,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:04,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443596080] [2021-11-07 02:25:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:04,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:04,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:04,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:04,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:25:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:05,183 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 02:25:05,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:05,413 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 02:25:05,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:05,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443596080] [2021-11-07 02:25:05,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443596080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:05,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:05,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:25:05,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749627997] [2021-11-07 02:25:05,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:05,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:05,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:05,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:05,415 INFO L87 Difference]: Start difference. First operand 13298 states and 24323 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:08,631 INFO L93 Difference]: Finished difference Result 33063 states and 60460 transitions. [2021-11-07 02:25:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:25:08,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:08,686 INFO L225 Difference]: With dead ends: 33063 [2021-11-07 02:25:08,686 INFO L226 Difference]: Without dead ends: 20058 [2021-11-07 02:25:08,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:25:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20058 states. [2021-11-07 02:25:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20058 to 13265. [2021-11-07 02:25:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13265 states, 13259 states have (on average 1.8244965683686551) internal successors, (24191), 13264 states have internal predecessors, (24191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13265 states to 13265 states and 24191 transitions. [2021-11-07 02:25:09,502 INFO L78 Accepts]: Start accepts. Automaton has 13265 states and 24191 transitions. Word has length 80 [2021-11-07 02:25:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:09,503 INFO L470 AbstractCegarLoop]: Abstraction has 13265 states and 24191 transitions. [2021-11-07 02:25:09,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 13265 states and 24191 transitions. [2021-11-07 02:25:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:25:09,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:09,514 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:09,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:09,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:09,729 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1885269621, now seen corresponding path program 1 times [2021-11-07 02:25:09,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:09,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148903942] [2021-11-07 02:25:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:09,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:09,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:09,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:25:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:10,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:10,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:10,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148903942] [2021-11-07 02:25:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148903942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:10,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828259192] [2021-11-07 02:25:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:25:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:25:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:10,955 INFO L87 Difference]: Start difference. First operand 13265 states and 24191 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:12,053 INFO L93 Difference]: Finished difference Result 39002 states and 71200 transitions. [2021-11-07 02:25:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:25:12,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-07 02:25:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:12,113 INFO L225 Difference]: With dead ends: 39002 [2021-11-07 02:25:12,114 INFO L226 Difference]: Without dead ends: 25916 [2021-11-07 02:25:12,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25916 states. [2021-11-07 02:25:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25916 to 25235. [2021-11-07 02:25:13,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25235 states, 25229 states have (on average 1.8264695390225534) internal successors, (46080), 25234 states have internal predecessors, (46080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25235 states to 25235 states and 46080 transitions. [2021-11-07 02:25:13,502 INFO L78 Accepts]: Start accepts. Automaton has 25235 states and 46080 transitions. Word has length 80 [2021-11-07 02:25:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 25235 states and 46080 transitions. [2021-11-07 02:25:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25235 states and 46080 transitions. [2021-11-07 02:25:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:25:13,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:13,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:13,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:13,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:13,735 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash 941420152, now seen corresponding path program 1 times [2021-11-07 02:25:13,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:13,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329006678] [2021-11-07 02:25:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:13,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:13,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:13,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:13,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:25:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:14,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:14,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:14,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329006678] [2021-11-07 02:25:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329006678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:14,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:14,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:14,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598315783] [2021-11-07 02:25:14,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:25:14,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:25:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:14,897 INFO L87 Difference]: Start difference. First operand 25235 states and 46080 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 02:25:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:16,904 INFO L93 Difference]: Finished difference Result 69551 states and 126603 transitions. [2021-11-07 02:25:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:25:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 81 [2021-11-07 02:25:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:16,979 INFO L225 Difference]: With dead ends: 69551 [2021-11-07 02:25:16,979 INFO L226 Difference]: Without dead ends: 44542 [2021-11-07 02:25:17,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44542 states. [2021-11-07 02:25:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44542 to 43861. [2021-11-07 02:25:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43861 states, 43855 states have (on average 1.8154600387641089) internal successors, (79617), 43860 states have internal predecessors, (79617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43861 states to 43861 states and 79617 transitions. [2021-11-07 02:25:19,159 INFO L78 Accepts]: Start accepts. Automaton has 43861 states and 79617 transitions. Word has length 81 [2021-11-07 02:25:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 43861 states and 79617 transitions. [2021-11-07 02:25:19,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 02:25:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 43861 states and 79617 transitions. [2021-11-07 02:25:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:25:19,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:19,176 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:19,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,397 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1520166628, now seen corresponding path program 1 times [2021-11-07 02:25:19,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:19,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198721743] [2021-11-07 02:25:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:19,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:19,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:19,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:25:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:25:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:20,315 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 02:25:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:20,548 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 02:25:20,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:20,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198721743] [2021-11-07 02:25:20,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198721743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:20,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:20,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:25:20,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186301933] [2021-11-07 02:25:20,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:20,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:20,550 INFO L87 Difference]: Start difference. First operand 43861 states and 79617 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:28,223 INFO L93 Difference]: Finished difference Result 170724 states and 309790 transitions. [2021-11-07 02:25:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:25:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 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 82 [2021-11-07 02:25:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:28,631 INFO L225 Difference]: With dead ends: 170724 [2021-11-07 02:25:28,631 INFO L226 Difference]: Without dead ends: 127155 [2021-11-07 02:25:28,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:25:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127155 states. [2021-11-07 02:25:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127155 to 43603. [2021-11-07 02:25:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43603 states, 43597 states have (on average 1.8025322843314906) internal successors, (78585), 43602 states have internal predecessors, (78585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43603 states to 43603 states and 78585 transitions. [2021-11-07 02:25:32,085 INFO L78 Accepts]: Start accepts. Automaton has 43603 states and 78585 transitions. Word has length 82 [2021-11-07 02:25:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:32,085 INFO L470 AbstractCegarLoop]: Abstraction has 43603 states and 78585 transitions. [2021-11-07 02:25:32,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 43603 states and 78585 transitions. [2021-11-07 02:25:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:25:32,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:32,096 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:32,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:32,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,297 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -449404026, now seen corresponding path program 1 times [2021-11-07 02:25:32,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:32,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218584681] [2021-11-07 02:25:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:32,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:32,299 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:32,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:25:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:33,276 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 02:25:33,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:33,486 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 02:25:33,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:33,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218584681] [2021-11-07 02:25:33,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218584681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:33,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:33,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:25:33,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156614455] [2021-11-07 02:25:33,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:33,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:33,488 INFO L87 Difference]: Start difference. First operand 43603 states and 78585 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:35,845 INFO L93 Difference]: Finished difference Result 87589 states and 157823 transitions. [2021-11-07 02:25:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:25:35,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:25:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:35,911 INFO L225 Difference]: With dead ends: 87589 [2021-11-07 02:25:35,911 INFO L226 Difference]: Without dead ends: 44284 [2021-11-07 02:25:35,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44284 states. [2021-11-07 02:25:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44284 to 43603. [2021-11-07 02:25:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43603 states, 43597 states have (on average 1.7995963024978783) internal successors, (78457), 43602 states have internal predecessors, (78457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43603 states to 43603 states and 78457 transitions. [2021-11-07 02:25:38,406 INFO L78 Accepts]: Start accepts. Automaton has 43603 states and 78457 transitions. Word has length 82 [2021-11-07 02:25:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:38,407 INFO L470 AbstractCegarLoop]: Abstraction has 43603 states and 78457 transitions. [2021-11-07 02:25:38,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43603 states and 78457 transitions. [2021-11-07 02:25:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:25:38,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:38,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:38,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:38,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:38,620 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:25:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1094047993, now seen corresponding path program 1 times [2021-11-07 02:25:38,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:38,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759163685] [2021-11-07 02:25:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:38,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:38,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:38,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c4bf75-59d3-439d-8c84-3dad3b2be7cd/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:25:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:25:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:39,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:39,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759163685] [2021-11-07 02:25:39,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759163685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:39,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:39,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:39,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940330266] [2021-11-07 02:25:39,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:25:39,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:25:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:25:39,789 INFO L87 Difference]: Start difference. First operand 43603 states and 78457 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)