./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product15.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_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/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_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/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_e413f901-78b3-498f-85d7-d2ab136585eb/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 34de882518b863b3a10882f7e6c83b5092b3f8512e5800a72c11385e11ff9a6e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:20:45,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:20:45,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:20:45,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:20:45,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:20:45,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:20:45,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:20:45,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:20:45,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:20:45,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:20:45,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:20:45,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:20:45,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:20:45,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:20:45,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:20:46,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:20:46,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:20:46,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:20:46,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:20:46,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:20:46,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:20:46,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:20:46,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:20:46,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:20:46,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:20:46,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:20:46,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:20:46,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:20:46,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:20:46,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:20:46,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:20:46,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:20:46,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:20:46,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:20:46,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:20:46,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:20:46,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:20:46,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:20:46,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:20:46,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:20:46,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:20:46,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:20:46,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:20:46,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:20:46,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:20:46,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:20:46,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:20:46,089 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:20:46,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:20:46,096 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:20:46,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:20:46,096 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:20:46,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:20:46,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:20:46,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:20:46,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:20:46,098 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:20:46,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:20:46,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:20:46,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:20:46,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:20:46,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:20:46,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:20:46,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:20:46,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:20:46,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:20:46,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:20:46,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:20:46,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:20:46,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:20:46,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:20:46,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:20:46,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:46,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:20:46,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:20:46,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:20:46,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:20:46,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:20:46,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:20:46,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:20:46,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:20:46,105 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_e413f901-78b3-498f-85d7-d2ab136585eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34de882518b863b3a10882f7e6c83b5092b3f8512e5800a72c11385e11ff9a6e [2021-11-07 02:20:46,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:20:46,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:20:46,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:20:46,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:20:46,438 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:20:46,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2021-11-07 02:20:46,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/ecf36dca1/7ac6d632ad4e42c5bb78e5ecd003c427/FLAGc60b56021 [2021-11-07 02:20:47,100 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:20:47,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2021-11-07 02:20:47,134 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/ecf36dca1/7ac6d632ad4e42c5bb78e5ecd003c427/FLAGc60b56021 [2021-11-07 02:20:47,319 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/ecf36dca1/7ac6d632ad4e42c5bb78e5ecd003c427 [2021-11-07 02:20:47,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:20:47,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:20:47,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:47,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:20:47,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:20:47,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:47" (1/1) ... [2021-11-07 02:20:47,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a4e3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:47, skipping insertion in model container [2021-11-07 02:20:47,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:47" (1/1) ... [2021-11-07 02:20:47,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:20:47,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:47,956 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_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c[45629,45642] [2021-11-07 02:20:48,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:48,057 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 02:20:48,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44d0bab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:48, skipping insertion in model container [2021-11-07 02:20:48,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:48,059 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:20:48,061 INFO L168 Benchmark]: Toolchain (without parser) took 736.89 ms. Allocated memory is still 121.6 MB. Free memory was 79.6 MB in the beginning and 83.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:20:48,063 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 121.6 MB. Free memory was 98.5 MB in the beginning and 98.4 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:20:48,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.97 ms. Allocated memory is still 121.6 MB. Free memory was 79.4 MB in the beginning and 83.4 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:20:48,067 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 121.6 MB. Free memory was 98.5 MB in the beginning and 98.4 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 729.97 ms. Allocated memory is still 121.6 MB. Free memory was 79.4 MB in the beginning and 83.4 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2435]: 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_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/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_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/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_e413f901-78b3-498f-85d7-d2ab136585eb/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 34de882518b863b3a10882f7e6c83b5092b3f8512e5800a72c11385e11ff9a6e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:20:50,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:20:50,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:20:50,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:20:50,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:20:50,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:20:50,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:20:50,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:20:50,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:20:50,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:20:50,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:20:50,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:20:50,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:20:50,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:20:50,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:20:50,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:20:50,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:20:50,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:20:50,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:20:50,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:20:50,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:20:50,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:20:50,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:20:50,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:20:50,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:20:50,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:20:50,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:20:50,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:20:50,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:20:50,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:20:50,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:20:50,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:20:50,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:20:50,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:20:50,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:20:50,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:20:50,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:20:50,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:20:50,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:20:50,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:20:50,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:20:50,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:20:50,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:20:50,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:20:50,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:20:50,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:20:50,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:20:50,415 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:20:50,415 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:20:50,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:20:50,415 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:20:50,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:20:50,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:20:50,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:20:50,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:20:50,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:20:50,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:20:50,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:20:50,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:20:50,417 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:20:50,418 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:20:50,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:20:50,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:20:50,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:20:50,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:20:50,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:20:50,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:20:50,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:20:50,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:50,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:20:50,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:20:50,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:20:50,421 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_e413f901-78b3-498f-85d7-d2ab136585eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34de882518b863b3a10882f7e6c83b5092b3f8512e5800a72c11385e11ff9a6e [2021-11-07 02:20:50,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:20:50,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:20:50,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:20:50,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:20:50,831 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:20:50,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2021-11-07 02:20:50,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/393285677/cb4801a1e50a4575abd51605d354f3a0/FLAG7233a6ca9 [2021-11-07 02:20:51,557 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:20:51,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c [2021-11-07 02:20:51,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/393285677/cb4801a1e50a4575abd51605d354f3a0/FLAG7233a6ca9 [2021-11-07 02:20:51,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/data/393285677/cb4801a1e50a4575abd51605d354f3a0 [2021-11-07 02:20:51,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:20:51,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:20:51,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:51,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:20:51,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:20:51,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:51" (1/1) ... [2021-11-07 02:20:51,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e186eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:51, skipping insertion in model container [2021-11-07 02:20:51,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:20:51" (1/1) ... [2021-11-07 02:20:51,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:20:51,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:52,380 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_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c[45629,45642] [2021-11-07 02:20:52,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:52,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:20:52,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:20:52,618 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_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c[45629,45642] [2021-11-07 02:20:52,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:52,671 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:20:52,733 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_e413f901-78b3-498f-85d7-d2ab136585eb/sv-benchmarks/c/product-lines/email_spec11_product15.cil.c[45629,45642] [2021-11-07 02:20:52,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:20:52,807 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:20:52,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52 WrapperNode [2021-11-07 02:20:52,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:20:52,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:20:52,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:20:52,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:20:52,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:52,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:52,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:20:52,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:20:52,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:20:52,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:20:52,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:52,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:52,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:52,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:53,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:53,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:53,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:53,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:20:53,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:20:53,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:20:53,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:20:53,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (1/1) ... [2021-11-07 02:20:53,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:20:53,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:20:53,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:20:53,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:20:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:20:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:20:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:20:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:20:53,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:20:57,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:20:57,358 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 02:20:57,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:57 BoogieIcfgContainer [2021-11-07 02:20:57,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:20:57,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:20:57,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:20:57,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:20:57,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:20:51" (1/3) ... [2021-11-07 02:20:57,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b665d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:57, skipping insertion in model container [2021-11-07 02:20:57,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:20:52" (2/3) ... [2021-11-07 02:20:57,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b665d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:20:57, skipping insertion in model container [2021-11-07 02:20:57,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:20:57" (3/3) ... [2021-11-07 02:20:57,370 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product15.cil.c [2021-11-07 02:20:57,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:20:57,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:20:57,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:20:57,457 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 02:20:57,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:20:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 407 states, 404 states have (on average 1.7623762376237624) internal successors, (712), 406 states have internal predecessors, (712), 0 states have call successors, (0), 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 02:20:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:20:57,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:57,523 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] [2021-11-07 02:20:57,523 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2103786118, now seen corresponding path program 1 times [2021-11-07 02:20:57,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:57,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277379073] [2021-11-07 02:20:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:57,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:57,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:57,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:57,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:20:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:20:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:58,231 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 02:20:58,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:58,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:58,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277379073] [2021-11-07 02:20:58,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277379073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:58,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:58,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:20:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614897121] [2021-11-07 02:20:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:20:58,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:20:58,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:20:58,386 INFO L87 Difference]: Start difference. First operand has 407 states, 404 states have (on average 1.7623762376237624) internal successors, (712), 406 states have internal predecessors, (712), 0 states have call successors, (0), 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 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:58,433 INFO L93 Difference]: Finished difference Result 572 states and 983 transitions. [2021-11-07 02:20:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:20:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:20:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:58,450 INFO L225 Difference]: With dead ends: 572 [2021-11-07 02:20:58,450 INFO L226 Difference]: Without dead ends: 396 [2021-11-07 02:20:58,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 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 02:20:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-07 02:20:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-11-07 02:20:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.751269035532995) internal successors, (690), 395 states have internal predecessors, (690), 0 states have call successors, (0), 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 02:20:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 690 transitions. [2021-11-07 02:20:58,519 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 690 transitions. Word has length 52 [2021-11-07 02:20:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:58,519 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 690 transitions. [2021-11-07 02:20:58,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 690 transitions. [2021-11-07 02:20:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:20:58,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:58,523 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] [2021-11-07 02:20:58,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:58,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:58,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -751079129, now seen corresponding path program 1 times [2021-11-07 02:20:58,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:58,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35675518] [2021-11-07 02:20:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:58,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:58,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:20:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:20:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:59,290 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 02:20:59,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:59,507 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 02:20:59,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:59,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35675518] [2021-11-07 02:20:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35675518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:59,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:59,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:59,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492376907] [2021-11-07 02:20:59,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:59,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:59,515 INFO L87 Difference]: Start difference. First operand 396 states and 690 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 02:20:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:59,634 INFO L93 Difference]: Finished difference Result 1158 states and 2022 transitions. [2021-11-07 02:20:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 53 [2021-11-07 02:20:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:59,643 INFO L225 Difference]: With dead ends: 1158 [2021-11-07 02:20:59,643 INFO L226 Difference]: Without dead ends: 777 [2021-11-07 02:20:59,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 02:20:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-07 02:20:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 395. [2021-11-07 02:20:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 393 states have (on average 1.743002544529262) internal successors, (685), 394 states have internal predecessors, (685), 0 states have call successors, (0), 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 02:20:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 685 transitions. [2021-11-07 02:20:59,693 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 685 transitions. Word has length 53 [2021-11-07 02:20:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:59,694 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 685 transitions. [2021-11-07 02:20:59,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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 02:20:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 685 transitions. [2021-11-07 02:20:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:20:59,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:59,697 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 02:20:59,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:59,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:59,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:20:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1582952845, now seen corresponding path program 1 times [2021-11-07 02:20:59,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:59,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796066909] [2021-11-07 02:20:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:59,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:59,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:59,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:59,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:21:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:00,485 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 02:21:00,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:00,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:00,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796066909] [2021-11-07 02:21:00,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796066909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:00,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:00,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:00,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95697575] [2021-11-07 02:21:00,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:00,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:00,644 INFO L87 Difference]: Start difference. First operand 395 states and 685 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:00,843 INFO L93 Difference]: Finished difference Result 1497 states and 2602 transitions. [2021-11-07 02:21:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:00,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:21:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:00,852 INFO L225 Difference]: With dead ends: 1497 [2021-11-07 02:21:00,852 INFO L226 Difference]: Without dead ends: 1120 [2021-11-07 02:21:00,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 02:21:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-11-07 02:21:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 394. [2021-11-07 02:21:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 392 states have (on average 1.7372448979591837) internal successors, (681), 393 states have internal predecessors, (681), 0 states have call successors, (0), 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 02:21:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 681 transitions. [2021-11-07 02:21:00,896 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 681 transitions. Word has length 55 [2021-11-07 02:21:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:00,897 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 681 transitions. [2021-11-07 02:21:00,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 681 transitions. [2021-11-07 02:21:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:21:00,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:00,899 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 02:21:00,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:01,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:01,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1379163232, now seen corresponding path program 1 times [2021-11-07 02:21:01,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:01,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70180361] [2021-11-07 02:21:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:01,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:01,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:01,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:01,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:21:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:21:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:01,693 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 02:21:01,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:01,839 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 02:21:01,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:01,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70180361] [2021-11-07 02:21:01,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70180361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:01,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:01,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:01,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377515778] [2021-11-07 02:21:01,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:01,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:01,842 INFO L87 Difference]: Start difference. First operand 394 states and 681 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 02:21:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:01,913 INFO L93 Difference]: Finished difference Result 785 states and 1359 transitions. [2021-11-07 02:21:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 02:21:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:01,918 INFO L225 Difference]: With dead ends: 785 [2021-11-07 02:21:01,918 INFO L226 Difference]: Without dead ends: 399 [2021-11-07 02:21:01,919 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 02:21:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-07 02:21:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 394. [2021-11-07 02:21:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 392 states have (on average 1.7295918367346939) internal successors, (678), 393 states have internal predecessors, (678), 0 states have call successors, (0), 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 02:21:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 678 transitions. [2021-11-07 02:21:01,947 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 678 transitions. Word has length 56 [2021-11-07 02:21:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:01,949 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 678 transitions. [2021-11-07 02:21:01,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 02:21:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 678 transitions. [2021-11-07 02:21:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:21:01,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:01,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:01,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:02,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:02,168 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 943175797, now seen corresponding path program 1 times [2021-11-07 02:21:02,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:02,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963915134] [2021-11-07 02:21:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:02,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:02,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:02,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:21:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:02,771 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 02:21:02,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:02,927 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 02:21:02,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963915134] [2021-11-07 02:21:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963915134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:02,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:02,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:02,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127378812] [2021-11-07 02:21:02,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:02,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:02,929 INFO L87 Difference]: Start difference. First operand 394 states and 678 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 02:21:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:03,148 INFO L93 Difference]: Finished difference Result 1484 states and 2578 transitions. [2021-11-07 02:21:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:03,149 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 57 [2021-11-07 02:21:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:03,156 INFO L225 Difference]: With dead ends: 1484 [2021-11-07 02:21:03,157 INFO L226 Difference]: Without dead ends: 1116 [2021-11-07 02:21:03,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 02:21:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-11-07 02:21:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 394. [2021-11-07 02:21:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 392 states have (on average 1.721938775510204) internal successors, (675), 393 states have internal predecessors, (675), 0 states have call successors, (0), 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 02:21:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 675 transitions. [2021-11-07 02:21:03,195 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 675 transitions. Word has length 57 [2021-11-07 02:21:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:03,195 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 675 transitions. [2021-11-07 02:21:03,196 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 02:21:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 675 transitions. [2021-11-07 02:21:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:21:03,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:03,197 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 02:21:03,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:03,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:03,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 608949232, now seen corresponding path program 1 times [2021-11-07 02:21:03,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:03,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538340042] [2021-11-07 02:21:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:03,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:03,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:03,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:21:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:03,966 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 02:21:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:04,100 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 02:21:04,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:04,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538340042] [2021-11-07 02:21:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538340042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:04,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:04,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:04,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453421268] [2021-11-07 02:21:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:04,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:04,103 INFO L87 Difference]: Start difference. First operand 394 states and 675 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 02:21:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:04,172 INFO L93 Difference]: Finished difference Result 916 states and 1572 transitions. [2021-11-07 02:21:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:04,172 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 02:21:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:04,178 INFO L225 Difference]: With dead ends: 916 [2021-11-07 02:21:04,178 INFO L226 Difference]: Without dead ends: 762 [2021-11-07 02:21:04,179 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 02:21:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-07 02:21:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 608. [2021-11-07 02:21:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 606 states have (on average 1.7590759075907592) internal successors, (1066), 607 states have internal predecessors, (1066), 0 states have call successors, (0), 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 02:21:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1066 transitions. [2021-11-07 02:21:04,230 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1066 transitions. Word has length 59 [2021-11-07 02:21:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:04,230 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1066 transitions. [2021-11-07 02:21:04,231 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 02:21:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1066 transitions. [2021-11-07 02:21:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:21:04,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:04,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:04,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:04,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:04,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1697637121, now seen corresponding path program 1 times [2021-11-07 02:21:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:04,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441311790] [2021-11-07 02:21:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:04,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:04,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:21:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:05,064 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 02:21:05,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:05,220 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 02:21:05,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:05,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441311790] [2021-11-07 02:21:05,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441311790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:05,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:05,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:05,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914040726] [2021-11-07 02:21:05,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:05,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:05,223 INFO L87 Difference]: Start difference. First operand 608 states and 1066 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:05,306 INFO L93 Difference]: Finished difference Result 1448 states and 2546 transitions. [2021-11-07 02:21:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:21:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:05,313 INFO L225 Difference]: With dead ends: 1448 [2021-11-07 02:21:05,313 INFO L226 Difference]: Without dead ends: 924 [2021-11-07 02:21:05,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-07 02:21:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 770. [2021-11-07 02:21:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 768 states have (on average 1.7708333333333333) internal successors, (1360), 769 states have internal predecessors, (1360), 0 states have call successors, (0), 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 02:21:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1360 transitions. [2021-11-07 02:21:05,391 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1360 transitions. Word has length 71 [2021-11-07 02:21:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:05,393 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1360 transitions. [2021-11-07 02:21:05,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1360 transitions. [2021-11-07 02:21:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:21:05,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:05,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:05,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:05,612 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -117067808, now seen corresponding path program 1 times [2021-11-07 02:21:05,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:05,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746876954] [2021-11-07 02:21:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:05,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:05,618 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:05,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:21:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:06,293 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 02:21:06,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:06,464 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 02:21:06,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:06,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746876954] [2021-11-07 02:21:06,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746876954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:06,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:06,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088272342] [2021-11-07 02:21:06,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:06,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:06,466 INFO L87 Difference]: Start difference. First operand 770 states and 1360 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:06,600 INFO L93 Difference]: Finished difference Result 1966 states and 3493 transitions. [2021-11-07 02:21:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:21:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:06,609 INFO L225 Difference]: With dead ends: 1966 [2021-11-07 02:21:06,609 INFO L226 Difference]: Without dead ends: 1288 [2021-11-07 02:21:06,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-11-07 02:21:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1134. [2021-11-07 02:21:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1132 states have (on average 1.7879858657243817) internal successors, (2024), 1133 states have internal predecessors, (2024), 0 states have call successors, (0), 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 02:21:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2024 transitions. [2021-11-07 02:21:06,722 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2024 transitions. Word has length 72 [2021-11-07 02:21:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 2024 transitions. [2021-11-07 02:21:06,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2024 transitions. [2021-11-07 02:21:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:21:06,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:06,732 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:06,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:06,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:06,948 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1347977519, now seen corresponding path program 1 times [2021-11-07 02:21:06,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:06,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196062288] [2021-11-07 02:21:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:06,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:06,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:06,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:21:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:07,604 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 02:21:07,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:07,798 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 02:21:07,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:07,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196062288] [2021-11-07 02:21:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196062288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:07,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:07,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729253706] [2021-11-07 02:21:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:07,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:07,801 INFO L87 Difference]: Start difference. First operand 1134 states and 2024 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:07,994 INFO L93 Difference]: Finished difference Result 3038 states and 5454 transitions. [2021-11-07 02:21:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:21:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:08,007 INFO L225 Difference]: With dead ends: 3038 [2021-11-07 02:21:08,007 INFO L226 Difference]: Without dead ends: 2004 [2021-11-07 02:21:08,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-11-07 02:21:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1850. [2021-11-07 02:21:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1848 states have (on average 1.8024891774891776) internal successors, (3331), 1849 states have internal predecessors, (3331), 0 states have call successors, (0), 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 02:21:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 3331 transitions. [2021-11-07 02:21:08,185 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 3331 transitions. Word has length 73 [2021-11-07 02:21:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:08,186 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 3331 transitions. [2021-11-07 02:21:08,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 3331 transitions. [2021-11-07 02:21:08,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:21:08,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:08,191 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 02:21:08,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:08,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:08,412 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:08,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1595318609, now seen corresponding path program 1 times [2021-11-07 02:21:08,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:08,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468248967] [2021-11-07 02:21:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:08,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:08,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:08,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:21:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:08,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:09,120 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 02:21:09,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:09,297 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 02:21:09,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:09,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468248967] [2021-11-07 02:21:09,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468248967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:09,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:09,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:09,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031983936] [2021-11-07 02:21:09,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:09,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:09,299 INFO L87 Difference]: Start difference. First operand 1850 states and 3331 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 02:21:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:09,535 INFO L93 Difference]: Finished difference Result 4922 states and 8894 transitions. [2021-11-07 02:21:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:09,535 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 02:21:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:09,556 INFO L225 Difference]: With dead ends: 4922 [2021-11-07 02:21:09,556 INFO L226 Difference]: Without dead ends: 3206 [2021-11-07 02:21:09,560 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 02:21:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-11-07 02:21:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3052. [2021-11-07 02:21:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3050 states have (on average 1.8098360655737704) internal successors, (5520), 3051 states have internal predecessors, (5520), 0 states have call successors, (0), 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 02:21:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 5520 transitions. [2021-11-07 02:21:09,830 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 5520 transitions. Word has length 74 [2021-11-07 02:21:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:09,831 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 5520 transitions. [2021-11-07 02:21:09,831 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 02:21:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 5520 transitions. [2021-11-07 02:21:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:21:09,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:09,837 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 02:21:09,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:10,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:10,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:10,053 INFO L85 PathProgramCache]: Analyzing trace with hash 507433568, now seen corresponding path program 1 times [2021-11-07 02:21:10,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:10,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964484051] [2021-11-07 02:21:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:10,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:10,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:21:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:10,825 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 02:21:10,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:11,007 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 02:21:11,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:11,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964484051] [2021-11-07 02:21:11,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964484051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:11,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:11,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:11,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478732892] [2021-11-07 02:21:11,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:11,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:11,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:11,010 INFO L87 Difference]: Start difference. First operand 3052 states and 5520 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 02:21:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:11,378 INFO L93 Difference]: Finished difference Result 8244 states and 14944 transitions. [2021-11-07 02:21:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:11,379 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 02:21:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:11,414 INFO L225 Difference]: With dead ends: 8244 [2021-11-07 02:21:11,414 INFO L226 Difference]: Without dead ends: 5360 [2021-11-07 02:21:11,418 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 02:21:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2021-11-07 02:21:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 5206. [2021-11-07 02:21:11,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5206 states, 5204 states have (on average 1.8126441199077632) internal successors, (9433), 5205 states have internal predecessors, (9433), 0 states have call successors, (0), 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 02:21:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 9433 transitions. [2021-11-07 02:21:11,843 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 9433 transitions. Word has length 75 [2021-11-07 02:21:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:11,844 INFO L470 AbstractCegarLoop]: Abstraction has 5206 states and 9433 transitions. [2021-11-07 02:21:11,845 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 02:21:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 9433 transitions. [2021-11-07 02:21:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:21:11,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:11,853 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 02:21:11,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,074 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1977880896, now seen corresponding path program 1 times [2021-11-07 02:21:12,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:12,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163086820] [2021-11-07 02:21:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:12,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:12,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:12,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:21:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:12,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:12,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:12,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163086820] [2021-11-07 02:21:12,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163086820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:12,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:12,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:12,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196400860] [2021-11-07 02:21:12,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:12,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:12,969 INFO L87 Difference]: Start difference. First operand 5206 states and 9433 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 02:21:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:13,598 INFO L93 Difference]: Finished difference Result 15164 states and 27525 transitions. [2021-11-07 02:21:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:13,599 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 02:21:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:13,667 INFO L225 Difference]: With dead ends: 15164 [2021-11-07 02:21:13,668 INFO L226 Difference]: Without dead ends: 10130 [2021-11-07 02:21:13,675 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 02:21:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10130 states. [2021-11-07 02:21:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10130 to 9976. [2021-11-07 02:21:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9976 states, 9974 states have (on average 1.8137156607178664) internal successors, (18090), 9975 states have internal predecessors, (18090), 0 states have call successors, (0), 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 02:21:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9976 states to 9976 states and 18090 transitions. [2021-11-07 02:21:14,432 INFO L78 Accepts]: Start accepts. Automaton has 9976 states and 18090 transitions. Word has length 76 [2021-11-07 02:21:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:14,433 INFO L470 AbstractCegarLoop]: Abstraction has 9976 states and 18090 transitions. [2021-11-07 02:21:14,433 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 02:21:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 9976 states and 18090 transitions. [2021-11-07 02:21:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:21:14,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:14,444 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] [2021-11-07 02:21:14,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:14,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:14,666 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1436886384, now seen corresponding path program 1 times [2021-11-07 02:21:14,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:14,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358621769] [2021-11-07 02:21:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:14,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:14,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:14,670 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:14,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:21:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:15,434 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 02:21:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:15,654 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 02:21:15,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:15,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358621769] [2021-11-07 02:21:15,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358621769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:15,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:15,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:15,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521304925] [2021-11-07 02:21:15,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:15,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:15,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:15,656 INFO L87 Difference]: Start difference. First operand 9976 states and 18090 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:18,675 INFO L93 Difference]: Finished difference Result 24559 states and 44549 transitions. [2021-11-07 02:21:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:21:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:18,717 INFO L225 Difference]: With dead ends: 24559 [2021-11-07 02:21:18,717 INFO L226 Difference]: Without dead ends: 14833 [2021-11-07 02:21:18,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 02:21:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14833 states. [2021-11-07 02:21:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14833 to 9943. [2021-11-07 02:21:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9941 states have (on average 1.8064581028065587) internal successors, (17958), 9942 states have internal predecessors, (17958), 0 states have call successors, (0), 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 02:21:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 17958 transitions. [2021-11-07 02:21:19,450 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 17958 transitions. Word has length 77 [2021-11-07 02:21:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:19,451 INFO L470 AbstractCegarLoop]: Abstraction has 9943 states and 17958 transitions. [2021-11-07 02:21:19,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 17958 transitions. [2021-11-07 02:21:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:21:19,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:19,461 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 02:21:19,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:19,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:19,677 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1402289585, now seen corresponding path program 1 times [2021-11-07 02:21:19,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:19,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958665043] [2021-11-07 02:21:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:19,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:19,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:19,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:19,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:21:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:20,477 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 02:21:20,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:20,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:20,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958665043] [2021-11-07 02:21:20,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958665043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:20,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:20,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:20,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205434419] [2021-11-07 02:21:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:20,664 INFO L87 Difference]: Start difference. First operand 9943 states and 17958 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 02:21:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:21,611 INFO L93 Difference]: Finished difference Result 29079 states and 52583 transitions. [2021-11-07 02:21:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:21,611 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 02:21:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:21,669 INFO L225 Difference]: With dead ends: 29079 [2021-11-07 02:21:21,669 INFO L226 Difference]: Without dead ends: 19315 [2021-11-07 02:21:21,686 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 02:21:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19315 states. [2021-11-07 02:21:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19315 to 19161. [2021-11-07 02:21:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19161 states, 19159 states have (on average 1.8058875724202725) internal successors, (34599), 19160 states have internal predecessors, (34599), 0 states have call successors, (0), 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 02:21:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19161 states to 19161 states and 34599 transitions. [2021-11-07 02:21:22,711 INFO L78 Accepts]: Start accepts. Automaton has 19161 states and 34599 transitions. Word has length 77 [2021-11-07 02:21:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:22,711 INFO L470 AbstractCegarLoop]: Abstraction has 19161 states and 34599 transitions. [2021-11-07 02:21:22,711 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 02:21:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 19161 states and 34599 transitions. [2021-11-07 02:21:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:21:22,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:22,724 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 02:21:22,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:22,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:22,938 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -403385214, now seen corresponding path program 1 times [2021-11-07 02:21:22,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:22,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612580327] [2021-11-07 02:21:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:22,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:22,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:22,940 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:22,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:21:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:23,740 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 02:21:23,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:23,892 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 02:21:23,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:23,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612580327] [2021-11-07 02:21:23,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612580327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:23,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:23,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:23,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496412771] [2021-11-07 02:21:23,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:23,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:23,894 INFO L87 Difference]: Start difference. First operand 19161 states and 34599 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 02:21:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:25,529 INFO L93 Difference]: Finished difference Result 56919 states and 102820 transitions. [2021-11-07 02:21:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:25,529 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 02:21:25,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:25,670 INFO L225 Difference]: With dead ends: 56919 [2021-11-07 02:21:25,670 INFO L226 Difference]: Without dead ends: 37941 [2021-11-07 02:21:25,703 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 02:21:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37941 states. [2021-11-07 02:21:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37941 to 37787. [2021-11-07 02:21:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37787 states, 37785 states have (on average 1.803255260023819) internal successors, (68136), 37786 states have internal predecessors, (68136), 0 states have call successors, (0), 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 02:21:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37787 states to 37787 states and 68136 transitions. [2021-11-07 02:21:27,800 INFO L78 Accepts]: Start accepts. Automaton has 37787 states and 68136 transitions. Word has length 78 [2021-11-07 02:21:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:27,801 INFO L470 AbstractCegarLoop]: Abstraction has 37787 states and 68136 transitions. [2021-11-07 02:21:27,801 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 02:21:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 37787 states and 68136 transitions. [2021-11-07 02:21:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:21:27,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:27,816 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] [2021-11-07 02:21:27,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:28,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,030 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1481413290, now seen corresponding path program 1 times [2021-11-07 02:21:28,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:28,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975891600] [2021-11-07 02:21:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:28,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:28,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:28,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:21:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:28,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:28,980 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 02:21:28,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:29,224 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 02:21:29,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:29,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975891600] [2021-11-07 02:21:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975891600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:29,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:29,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:29,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670009934] [2021-11-07 02:21:29,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:29,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:29,227 INFO L87 Difference]: Start difference. First operand 37787 states and 68136 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:21:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:35,909 INFO L93 Difference]: Finished difference Result 146557 states and 264112 transitions. [2021-11-07 02:21:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:21:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:21:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:36,270 INFO L225 Difference]: With dead ends: 146557 [2021-11-07 02:21:36,271 INFO L226 Difference]: Without dead ends: 109019 [2021-11-07 02:21:36,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 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 02:21:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109019 states. [2021-11-07 02:21:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109019 to 37529. [2021-11-07 02:21:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37527 states have (on average 1.7881525301782717) internal successors, (67104), 37528 states have internal predecessors, (67104), 0 states have call successors, (0), 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 02:21:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 67104 transitions. [2021-11-07 02:21:39,247 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 67104 transitions. Word has length 79 [2021-11-07 02:21:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:39,247 INFO L470 AbstractCegarLoop]: Abstraction has 37529 states and 67104 transitions. [2021-11-07 02:21:39,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:21:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 67104 transitions. [2021-11-07 02:21:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:21:39,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:39,256 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] [2021-11-07 02:21:39,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:21:39,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:39,470 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:39,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2041003020, now seen corresponding path program 1 times [2021-11-07 02:21:39,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:39,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014444686] [2021-11-07 02:21:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:39,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:39,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:39,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:39,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:21:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:40,337 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 02:21:40,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:40,515 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 02:21:40,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:40,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014444686] [2021-11-07 02:21:40,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014444686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:40,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:40,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:40,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392964066] [2021-11-07 02:21:40,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:40,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:40,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:40,518 INFO L87 Difference]: Start difference. First operand 37529 states and 67104 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:21:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:42,406 INFO L93 Difference]: Finished difference Result 74957 states and 134040 transitions. [2021-11-07 02:21:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:42,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:21:42,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:42,477 INFO L225 Difference]: With dead ends: 74957 [2021-11-07 02:21:42,477 INFO L226 Difference]: Without dead ends: 37683 [2021-11-07 02:21:42,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 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 02:21:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37683 states. [2021-11-07 02:21:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37683 to 37529. [2021-11-07 02:21:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37527 states have (on average 1.7847416526767395) internal successors, (66976), 37528 states have internal predecessors, (66976), 0 states have call successors, (0), 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 02:21:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 66976 transitions. [2021-11-07 02:21:44,481 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 66976 transitions. Word has length 79 [2021-11-07 02:21:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:44,482 INFO L470 AbstractCegarLoop]: Abstraction has 37529 states and 66976 transitions. [2021-11-07 02:21:44,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:21:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 66976 transitions. [2021-11-07 02:21:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:21:44,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:44,491 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 02:21:44,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:44,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:44,718 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2012028511, now seen corresponding path program 1 times [2021-11-07 02:21:44,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:44,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064516087] [2021-11-07 02:21:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:44,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:44,720 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:44,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e413f901-78b3-498f-85d7-d2ab136585eb/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:21:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:21:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:45,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:45,756 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 02:21:45,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:45,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064516087] [2021-11-07 02:21:45,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064516087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:45,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:45,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161068432] [2021-11-07 02:21:45,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:21:45,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:45,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:21:45,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:21:45,758 INFO L87 Difference]: Start difference. First operand 37529 states and 66976 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 02:21:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:48,917 INFO L93 Difference]: Finished difference Result 104183 states and 185570 transitions. [2021-11-07 02:21:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:48,918 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 02:21:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:49,034 INFO L225 Difference]: With dead ends: 104183 [2021-11-07 02:21:49,034 INFO L226 Difference]: Without dead ends: 66869 [2021-11-07 02:21:49,059 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 02:21:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66869 states.