./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product37.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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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 70e213904f46d9e57b153e0058e447b0a5def856d61642628bc56ad0035cdccb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:11,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:11,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:11,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:11,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:11,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:11,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:11,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:11,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:11,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:11,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:11,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:11,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:11,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:11,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:11,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:11,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:11,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:11,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:11,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:11,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:11,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:11,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:11,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:11,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:11,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:11,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:11,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:11,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:11,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:11,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:11,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:11,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:11,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:11,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:11,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:11,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:11,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:11,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:11,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:11,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:11,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:10:11,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:11,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:11,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:11,449 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:11,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:11,450 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:11,450 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:10:11,450 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:11,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:11,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:10:11,457 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:10:11,458 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:11,458 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:10:11,458 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:10:11,458 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:10:11,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:11,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:11,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:10:11,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:11,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:11,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:11,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:11,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:11,461 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:11,461 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:11,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:11,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:11,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:11,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:11,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:11,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:11,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:11,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:11,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:11,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:10:11,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:10:11,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:11,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:11,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:11,466 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70e213904f46d9e57b153e0058e447b0a5def856d61642628bc56ad0035cdccb [2021-11-07 01:10:11,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:11,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:11,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:11,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:11,766 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:11,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2021-11-07 01:10:11,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/b1cb8b5fd/07ee8227d1de45ae80b60bb4e1a70799/FLAG9ed4590a1 [2021-11-07 01:10:12,411 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:12,418 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2021-11-07 01:10:12,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/b1cb8b5fd/07ee8227d1de45ae80b60bb4e1a70799/FLAG9ed4590a1 [2021-11-07 01:10:12,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/b1cb8b5fd/07ee8227d1de45ae80b60bb4e1a70799 [2021-11-07 01:10:12,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:12,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:12,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:12,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:12,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:12,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:12" (1/1) ... [2021-11-07 01:10:12,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624b7e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:12, skipping insertion in model container [2021-11-07 01:10:12,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:12" (1/1) ... [2021-11-07 01:10:12,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:12,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:13,420 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43755,43768] [2021-11-07 01:10:13,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:13,541 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:10:13,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dc2cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:13, skipping insertion in model container [2021-11-07 01:10:13,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:13,542 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:10:13,545 INFO L168 Benchmark]: Toolchain (without parser) took 732.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.7 MB in the beginning and 70.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:13,546 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:10:13,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.67 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.5 MB in the beginning and 70.9 MB in the end (delta: -20.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:13,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 69.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 730.67 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.5 MB in the beginning and 70.9 MB in the end (delta: -20.4 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 324]: 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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 70e213904f46d9e57b153e0058e447b0a5def856d61642628bc56ad0035cdccb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:15,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:15,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:15,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:15,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:15,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:15,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:15,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:15,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:15,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:15,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:15,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:15,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:15,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:15,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:15,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:15,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:15,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:15,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:15,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:15,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:15,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:15,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:15,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:15,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:15,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:15,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:15,852 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:15,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:15,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:15,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:15,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:15,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:15,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:15,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:15,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:15,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:15,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:15,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:15,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:15,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:15,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:10:15,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:15,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:15,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:15,921 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:15,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:15,921 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:15,922 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:15,922 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:15,922 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:15,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:15,925 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:15,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:15,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:15,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:10:15,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:15,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:15,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:15,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:15,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:15,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:10:15,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:15,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:15,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:15,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:15,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:15,929 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:10:15,929 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:15,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:15,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:15,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:15,930 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70e213904f46d9e57b153e0058e447b0a5def856d61642628bc56ad0035cdccb [2021-11-07 01:10:16,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:16,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:16,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:16,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:16,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:16,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2021-11-07 01:10:16,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/1d5622399/c5491a159f1c46f781f694028aba18c6/FLAG19732e5fe [2021-11-07 01:10:17,174 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:17,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c [2021-11-07 01:10:17,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/1d5622399/c5491a159f1c46f781f694028aba18c6/FLAG19732e5fe [2021-11-07 01:10:17,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/data/1d5622399/c5491a159f1c46f781f694028aba18c6 [2021-11-07 01:10:17,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:17,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:17,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:17,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:17,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:17,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:17" (1/1) ... [2021-11-07 01:10:17,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97d623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:17, skipping insertion in model container [2021-11-07 01:10:17,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:17" (1/1) ... [2021-11-07 01:10:17,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:17,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:17,923 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43755,43768] [2021-11-07 01:10:18,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:18,045 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:10:18,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:18,190 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43755,43768] [2021-11-07 01:10:18,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:18,249 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:10:18,348 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_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/sv-benchmarks/c/product-lines/email_spec11_product37.cil.c[43755,43768] [2021-11-07 01:10:18,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:18,418 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:10:18,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18 WrapperNode [2021-11-07 01:10:18,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:18,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:18,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:10:18,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:10:18,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:18,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:10:18,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:10:18,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:10:18,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:10:18,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:10:18,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:10:18,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:10:18,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (1/1) ... [2021-11-07 01:10:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:18,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:10:18,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:10:18,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:10:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:10:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:10:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:10:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:10:18,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:22,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:22,797 INFO L299 CfgBuilder]: Removed 247 assume(true) statements. [2021-11-07 01:10:22,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:22 BoogieIcfgContainer [2021-11-07 01:10:22,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:22,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:22,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:22,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:22,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:10:17" (1/3) ... [2021-11-07 01:10:22,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633ac05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:22, skipping insertion in model container [2021-11-07 01:10:22,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:18" (2/3) ... [2021-11-07 01:10:22,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633ac05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:22, skipping insertion in model container [2021-11-07 01:10:22,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:22" (3/3) ... [2021-11-07 01:10:22,811 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product37.cil.c [2021-11-07 01:10:22,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:22,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:10:22,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:22,877 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:10:22,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:10:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 354 states have (on average 1.7485875706214689) internal successors, (619), 356 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 01:10:22,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:22,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:22,918 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1771516082, now seen corresponding path program 1 times [2021-11-07 01:10:22,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:22,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060732842] [2021-11-07 01:10:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:22,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:22,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:22,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:10:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:10:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:23,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:23,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060732842] [2021-11-07 01:10:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060732842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:23,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:10:23,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152007669] [2021-11-07 01:10:23,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:10:23,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:10:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:23,624 INFO L87 Difference]: Start difference. First operand has 357 states, 354 states have (on average 1.7485875706214689) internal successors, (619), 356 states have internal predecessors, (619), 0 states have call successors, (0), 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 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:23,674 INFO L93 Difference]: Finished difference Result 468 states and 790 transitions. [2021-11-07 01:10:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:10:23,676 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 01:10:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:23,693 INFO L225 Difference]: With dead ends: 468 [2021-11-07 01:10:23,694 INFO L226 Difference]: Without dead ends: 326 [2021-11-07 01:10:23,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-07 01:10:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-11-07 01:10:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 324 states have (on average 1.7438271604938271) internal successors, (565), 325 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 565 transitions. [2021-11-07 01:10:23,794 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 565 transitions. Word has length 38 [2021-11-07 01:10:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:23,794 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 565 transitions. [2021-11-07 01:10:23,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 565 transitions. [2021-11-07 01:10:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:10:23,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:23,804 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:23,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:24,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:24,019 INFO L85 PathProgramCache]: Analyzing trace with hash 671358751, now seen corresponding path program 1 times [2021-11-07 01:10:24,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:24,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016883084] [2021-11-07 01:10:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:24,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:24,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:24,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:24,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:10:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:24,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:24,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:24,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016883084] [2021-11-07 01:10:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016883084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:24,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:24,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:24,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428172471] [2021-11-07 01:10:24,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:24,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:24,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:24,645 INFO L87 Difference]: Start difference. First operand 326 states and 565 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:24,788 INFO L93 Difference]: Finished difference Result 948 states and 1647 transitions. [2021-11-07 01:10:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 01:10:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:24,795 INFO L225 Difference]: With dead ends: 948 [2021-11-07 01:10:24,795 INFO L226 Difference]: Without dead ends: 637 [2021-11-07 01:10:24,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-11-07 01:10:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 325. [2021-11-07 01:10:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.7337461300309598) internal successors, (560), 324 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 560 transitions. [2021-11-07 01:10:24,820 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 560 transitions. Word has length 39 [2021-11-07 01:10:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:24,821 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 560 transitions. [2021-11-07 01:10:24,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 560 transitions. [2021-11-07 01:10:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:10:24,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:24,824 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] [2021-11-07 01:10:24,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:25,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:25,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2026198523, now seen corresponding path program 1 times [2021-11-07 01:10:25,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:25,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441062871] [2021-11-07 01:10:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:25,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:25,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:25,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:10:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:25,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:25,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:25,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441062871] [2021-11-07 01:10:25,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441062871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:25,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:25,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:25,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308582809] [2021-11-07 01:10:25,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:25,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:25,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:25,639 INFO L87 Difference]: Start difference. First operand 325 states and 560 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:25,850 INFO L93 Difference]: Finished difference Result 1217 states and 2102 transitions. [2021-11-07 01:10:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:25,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 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 41 [2021-11-07 01:10:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:25,858 INFO L225 Difference]: With dead ends: 1217 [2021-11-07 01:10:25,858 INFO L226 Difference]: Without dead ends: 910 [2021-11-07 01:10:25,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-11-07 01:10:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 324. [2021-11-07 01:10:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 322 states have (on average 1.7267080745341614) internal successors, (556), 323 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:25,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 556 transitions. [2021-11-07 01:10:25,887 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 556 transitions. Word has length 41 [2021-11-07 01:10:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:25,887 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 556 transitions. [2021-11-07 01:10:25,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 556 transitions. [2021-11-07 01:10:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:10:25,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:25,889 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:25,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2066536104, now seen corresponding path program 1 times [2021-11-07 01:10:26,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:26,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85999226] [2021-11-07 01:10:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:26,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:26,110 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:26,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:10:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:26,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:26,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:26,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85999226] [2021-11-07 01:10:26,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85999226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:26,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:26,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:26,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179329567] [2021-11-07 01:10:26,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:26,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:26,733 INFO L87 Difference]: Start difference. First operand 324 states and 556 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:26,795 INFO L93 Difference]: Finished difference Result 645 states and 1109 transitions. [2021-11-07 01:10:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 42 [2021-11-07 01:10:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:26,800 INFO L225 Difference]: With dead ends: 645 [2021-11-07 01:10:26,801 INFO L226 Difference]: Without dead ends: 329 [2021-11-07 01:10:26,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-07 01:10:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2021-11-07 01:10:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 322 states have (on average 1.7173913043478262) internal successors, (553), 323 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 553 transitions. [2021-11-07 01:10:26,824 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 553 transitions. Word has length 42 [2021-11-07 01:10:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:26,825 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 553 transitions. [2021-11-07 01:10:26,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 553 transitions. [2021-11-07 01:10:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:10:26,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:26,828 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] [2021-11-07 01:10:26,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:27,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:27,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:27,043 INFO L85 PathProgramCache]: Analyzing trace with hash -615962899, now seen corresponding path program 1 times [2021-11-07 01:10:27,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:27,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416255713] [2021-11-07 01:10:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:27,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:27,045 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:27,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:10:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:27,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:27,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:27,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416255713] [2021-11-07 01:10:27,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416255713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:27,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:27,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309161994] [2021-11-07 01:10:27,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:27,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:27,715 INFO L87 Difference]: Start difference. First operand 324 states and 553 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:27,964 INFO L93 Difference]: Finished difference Result 1204 states and 2078 transitions. [2021-11-07 01:10:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 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 43 [2021-11-07 01:10:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:27,971 INFO L225 Difference]: With dead ends: 1204 [2021-11-07 01:10:27,971 INFO L226 Difference]: Without dead ends: 906 [2021-11-07 01:10:27,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-11-07 01:10:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 324. [2021-11-07 01:10:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 322 states have (on average 1.7080745341614907) internal successors, (550), 323 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 550 transitions. [2021-11-07 01:10:28,003 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 550 transitions. Word has length 43 [2021-11-07 01:10:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:28,005 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 550 transitions. [2021-11-07 01:10:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 550 transitions. [2021-11-07 01:10:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:10:28,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:28,006 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] [2021-11-07 01:10:28,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:28,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -26532440, now seen corresponding path program 1 times [2021-11-07 01:10:28,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:28,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958284454] [2021-11-07 01:10:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:28,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:28,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:10:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:28,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:28,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958284454] [2021-11-07 01:10:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958284454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:28,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:28,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:28,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082204719] [2021-11-07 01:10:28,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:28,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:28,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:28,887 INFO L87 Difference]: Start difference. First operand 324 states and 550 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:28,959 INFO L93 Difference]: Finished difference Result 702 states and 1190 transitions. [2021-11-07 01:10:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-11-07 01:10:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:28,964 INFO L225 Difference]: With dead ends: 702 [2021-11-07 01:10:28,964 INFO L226 Difference]: Without dead ends: 622 [2021-11-07 01:10:28,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-07 01:10:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 542. [2021-11-07 01:10:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 540 states have (on average 1.7555555555555555) internal successors, (948), 541 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 948 transitions. [2021-11-07 01:10:29,015 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 948 transitions. Word has length 45 [2021-11-07 01:10:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:29,016 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 948 transitions. [2021-11-07 01:10:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 948 transitions. [2021-11-07 01:10:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:10:29,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:29,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:29,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:29,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1541069991, now seen corresponding path program 1 times [2021-11-07 01:10:29,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:29,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970131616] [2021-11-07 01:10:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:29,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:29,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:29,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:10:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:29,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:29,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:29,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970131616] [2021-11-07 01:10:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970131616] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:29,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170823325] [2021-11-07 01:10:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:29,932 INFO L87 Difference]: Start difference. First operand 542 states and 948 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:30,001 INFO L93 Difference]: Finished difference Result 1246 states and 2185 transitions. [2021-11-07 01:10:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:10:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:30,007 INFO L225 Difference]: With dead ends: 1246 [2021-11-07 01:10:30,008 INFO L226 Difference]: Without dead ends: 788 [2021-11-07 01:10:30,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-07 01:10:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 708. [2021-11-07 01:10:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 706 states have (on average 1.7691218130311614) internal successors, (1249), 707 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1249 transitions. [2021-11-07 01:10:30,084 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1249 transitions. Word has length 57 [2021-11-07 01:10:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:30,085 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 1249 transitions. [2021-11-07 01:10:30,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1249 transitions. [2021-11-07 01:10:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:10:30,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:30,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:30,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:30,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1768379000, now seen corresponding path program 1 times [2021-11-07 01:10:30,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:30,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734284326] [2021-11-07 01:10:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:30,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:30,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:30,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:10:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:30,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:30,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:31,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:31,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734284326] [2021-11-07 01:10:31,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734284326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:31,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:31,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:31,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892709454] [2021-11-07 01:10:31,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:31,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:31,097 INFO L87 Difference]: Start difference. First operand 708 states and 1249 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:31,227 INFO L93 Difference]: Finished difference Result 1776 states and 3153 transitions. [2021-11-07 01:10:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:10:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:31,238 INFO L225 Difference]: With dead ends: 1776 [2021-11-07 01:10:31,238 INFO L226 Difference]: Without dead ends: 1160 [2021-11-07 01:10:31,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-07 01:10:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1080. [2021-11-07 01:10:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1078 states have (on average 1.787569573283859) internal successors, (1927), 1079 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1927 transitions. [2021-11-07 01:10:31,357 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1927 transitions. Word has length 58 [2021-11-07 01:10:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:31,357 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1927 transitions. [2021-11-07 01:10:31,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1927 transitions. [2021-11-07 01:10:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:10:31,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:31,360 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 01:10:31,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:10:31,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:31,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 381028871, now seen corresponding path program 1 times [2021-11-07 01:10:31,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:31,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315648738] [2021-11-07 01:10:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:31,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:31,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:10:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:32,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:32,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:32,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:32,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:32,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315648738] [2021-11-07 01:10:32,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315648738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:32,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:32,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:32,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266278000] [2021-11-07 01:10:32,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:32,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:32,357 INFO L87 Difference]: Start difference. First operand 1080 states and 1927 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 01:10:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:32,507 INFO L93 Difference]: Finished difference Result 2872 states and 5156 transitions. [2021-11-07 01:10:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 59 [2021-11-07 01:10:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:32,520 INFO L225 Difference]: With dead ends: 2872 [2021-11-07 01:10:32,520 INFO L226 Difference]: Without dead ends: 1892 [2021-11-07 01:10:32,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-11-07 01:10:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1812. [2021-11-07 01:10:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1810 states have (on average 1.8022099447513813) internal successors, (3262), 1811 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3262 transitions. [2021-11-07 01:10:32,676 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3262 transitions. Word has length 59 [2021-11-07 01:10:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:32,677 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 3262 transitions. [2021-11-07 01:10:32,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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 01:10:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3262 transitions. [2021-11-07 01:10:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:10:32,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:32,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:32,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:32,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:32,895 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1949337479, now seen corresponding path program 1 times [2021-11-07 01:10:32,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:32,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365484378] [2021-11-07 01:10:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:32,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:32,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:32,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:10:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:33,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:33,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:33,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365484378] [2021-11-07 01:10:33,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365484378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:33,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:33,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:33,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803129509] [2021-11-07 01:10:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:33,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:33,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:33,718 INFO L87 Difference]: Start difference. First operand 1812 states and 3262 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:33,978 INFO L93 Difference]: Finished difference Result 4804 states and 8680 transitions. [2021-11-07 01:10:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:33,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 60 [2021-11-07 01:10:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:33,999 INFO L225 Difference]: With dead ends: 4804 [2021-11-07 01:10:34,000 INFO L226 Difference]: Without dead ends: 3126 [2021-11-07 01:10:34,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-11-07 01:10:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3046. [2021-11-07 01:10:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3044 states have (on average 1.8091327201051248) internal successors, (5507), 3045 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 5507 transitions. [2021-11-07 01:10:34,285 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 5507 transitions. Word has length 60 [2021-11-07 01:10:34,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:34,285 INFO L470 AbstractCegarLoop]: Abstraction has 3046 states and 5507 transitions. [2021-11-07 01:10:34,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 5507 transitions. [2021-11-07 01:10:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:10:34,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:34,289 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] [2021-11-07 01:10:34,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:34,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:34,503 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 188142840, now seen corresponding path program 1 times [2021-11-07 01:10:34,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:34,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025319039] [2021-11-07 01:10:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:34,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:34,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:34,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:35,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:35,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:35,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025319039] [2021-11-07 01:10:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025319039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:35,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:35,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247012686] [2021-11-07 01:10:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:35,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:35,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:35,346 INFO L87 Difference]: Start difference. First operand 3046 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:35,679 INFO L93 Difference]: Finished difference Result 8222 states and 14898 transitions. [2021-11-07 01:10:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:10:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:35,713 INFO L225 Difference]: With dead ends: 8222 [2021-11-07 01:10:35,714 INFO L226 Difference]: Without dead ends: 5344 [2021-11-07 01:10:35,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2021-11-07 01:10:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 5264. [2021-11-07 01:10:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5262 states have (on average 1.8114785252755605) internal successors, (9532), 5263 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 9532 transitions. [2021-11-07 01:10:36,179 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 9532 transitions. Word has length 61 [2021-11-07 01:10:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:36,180 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 9532 transitions. [2021-11-07 01:10:36,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 9532 transitions. [2021-11-07 01:10:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:10:36,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:36,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:36,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:36,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:36,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -845997736, now seen corresponding path program 1 times [2021-11-07 01:10:36,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:36,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334209871] [2021-11-07 01:10:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:36,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:36,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:36,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:36,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:36,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:37,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:37,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:37,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334209871] [2021-11-07 01:10:37,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334209871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:37,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:37,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:37,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054041174] [2021-11-07 01:10:37,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:37,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:37,265 INFO L87 Difference]: Start difference. First operand 5264 states and 9532 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:10:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:37,930 INFO L93 Difference]: Finished difference Result 15202 states and 27584 transitions. [2021-11-07 01:10:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 62 [2021-11-07 01:10:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:37,989 INFO L225 Difference]: With dead ends: 15202 [2021-11-07 01:10:37,989 INFO L226 Difference]: Without dead ends: 10114 [2021-11-07 01:10:37,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-11-07 01:10:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 10034. [2021-11-07 01:10:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10034 states, 10032 states have (on average 1.813098086124402) internal successors, (18189), 10033 states have internal predecessors, (18189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10034 states to 10034 states and 18189 transitions. [2021-11-07 01:10:38,826 INFO L78 Accepts]: Start accepts. Automaton has 10034 states and 18189 transitions. Word has length 62 [2021-11-07 01:10:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:38,827 INFO L470 AbstractCegarLoop]: Abstraction has 10034 states and 18189 transitions. [2021-11-07 01:10:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:10:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 10034 states and 18189 transitions. [2021-11-07 01:10:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:10:38,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:38,838 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] [2021-11-07 01:10:38,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:39,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:39,052 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2091140168, now seen corresponding path program 1 times [2021-11-07 01:10:39,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:39,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797215729] [2021-11-07 01:10:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:39,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:39,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:39,055 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:39,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:10:39,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:10:39,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:39,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797215729] [2021-11-07 01:10:39,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797215729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:39,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:39,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:39,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82371783] [2021-11-07 01:10:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:39,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:39,966 INFO L87 Difference]: Start difference. First operand 10034 states and 18189 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:43,159 INFO L93 Difference]: Finished difference Result 24661 states and 44720 transitions. [2021-11-07 01:10:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:10:43,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 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 63 [2021-11-07 01:10:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:43,219 INFO L225 Difference]: With dead ends: 24661 [2021-11-07 01:10:43,220 INFO L226 Difference]: Without dead ends: 14881 [2021-11-07 01:10:43,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:10:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14881 states. [2021-11-07 01:10:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14881 to 10001. [2021-11-07 01:10:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 9999 states have (on average 1.8058805880588058) internal successors, (18057), 10000 states have internal predecessors, (18057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 18057 transitions. [2021-11-07 01:10:44,015 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 18057 transitions. Word has length 63 [2021-11-07 01:10:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:44,016 INFO L470 AbstractCegarLoop]: Abstraction has 10001 states and 18057 transitions. [2021-11-07 01:10:44,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 18057 transitions. [2021-11-07 01:10:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:10:44,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:44,021 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] [2021-11-07 01:10:44,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:44,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 412271399, now seen corresponding path program 1 times [2021-11-07 01:10:44,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:44,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616328693] [2021-11-07 01:10:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:44,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:44,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:44,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:44,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:44,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:45,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:45,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616328693] [2021-11-07 01:10:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616328693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:45,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:45,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:45,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885452007] [2021-11-07 01:10:45,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:45,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:45,195 INFO L87 Difference]: Start difference. First operand 10001 states and 18057 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:10:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:46,079 INFO L93 Difference]: Finished difference Result 29245 states and 52866 transitions. [2021-11-07 01:10:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 63 [2021-11-07 01:10:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:46,139 INFO L225 Difference]: With dead ends: 29245 [2021-11-07 01:10:46,140 INFO L226 Difference]: Without dead ends: 19427 [2021-11-07 01:10:46,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-11-07 01:10:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 19347. [2021-11-07 01:10:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19347 states, 19345 states have (on average 1.8052209873352287) internal successors, (34922), 19346 states have internal predecessors, (34922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19347 states to 19347 states and 34922 transitions. [2021-11-07 01:10:47,531 INFO L78 Accepts]: Start accepts. Automaton has 19347 states and 34922 transitions. Word has length 63 [2021-11-07 01:10:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:47,531 INFO L470 AbstractCegarLoop]: Abstraction has 19347 states and 34922 transitions. [2021-11-07 01:10:47,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:10:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19347 states and 34922 transitions. [2021-11-07 01:10:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:10:47,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:47,538 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] [2021-11-07 01:10:47,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:47,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:47,753 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:47,753 INFO L85 PathProgramCache]: Analyzing trace with hash 146900455, now seen corresponding path program 1 times [2021-11-07 01:10:47,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:47,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129622903] [2021-11-07 01:10:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:47,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:47,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:47,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:47,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:10:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:48,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:48,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:48,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129622903] [2021-11-07 01:10:48,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129622903] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:48,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:48,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:48,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138958474] [2021-11-07 01:10:48,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:48,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:48,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:48,740 INFO L87 Difference]: Start difference. First operand 19347 states and 34922 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:50,185 INFO L93 Difference]: Finished difference Result 57469 states and 103775 transitions. [2021-11-07 01:10:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:10:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:50,300 INFO L225 Difference]: With dead ends: 57469 [2021-11-07 01:10:50,300 INFO L226 Difference]: Without dead ends: 38309 [2021-11-07 01:10:50,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38309 states. [2021-11-07 01:10:52,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38309 to 38229. [2021-11-07 01:10:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38229 states, 38227 states have (on average 1.8025740968425459) internal successors, (68907), 38228 states have internal predecessors, (68907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38229 states to 38229 states and 68907 transitions. [2021-11-07 01:10:52,646 INFO L78 Accepts]: Start accepts. Automaton has 38229 states and 68907 transitions. Word has length 64 [2021-11-07 01:10:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:52,647 INFO L470 AbstractCegarLoop]: Abstraction has 38229 states and 68907 transitions. [2021-11-07 01:10:52,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38229 states and 68907 transitions. [2021-11-07 01:10:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:10:52,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:52,654 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] [2021-11-07 01:10:52,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:52,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:52,869 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:52,870 INFO L85 PathProgramCache]: Analyzing trace with hash -623212146, now seen corresponding path program 1 times [2021-11-07 01:10:52,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:52,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681158091] [2021-11-07 01:10:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:52,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:52,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:52,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:10:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:53,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:53,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:53,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681158091] [2021-11-07 01:10:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681158091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:53,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:53,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:53,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785334606] [2021-11-07 01:10:53,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:53,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:53,824 INFO L87 Difference]: Start difference. First operand 38229 states and 68907 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:00,396 INFO L93 Difference]: Finished difference Result 148313 states and 267175 transitions. [2021-11-07 01:11:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:11:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 65 [2021-11-07 01:11:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:00,667 INFO L225 Difference]: With dead ends: 148313 [2021-11-07 01:11:00,667 INFO L226 Difference]: Without dead ends: 110337 [2021-11-07 01:11:00,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:11:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110337 states. [2021-11-07 01:11:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110337 to 37971. [2021-11-07 01:11:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37971 states, 37969 states have (on average 1.787642550501725) internal successors, (67875), 37970 states have internal predecessors, (67875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37971 states to 37971 states and 67875 transitions. [2021-11-07 01:11:03,977 INFO L78 Accepts]: Start accepts. Automaton has 37971 states and 67875 transitions. Word has length 65 [2021-11-07 01:11:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:03,978 INFO L470 AbstractCegarLoop]: Abstraction has 37971 states and 67875 transitions. [2021-11-07 01:11:03,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 37971 states and 67875 transitions. [2021-11-07 01:11:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:11:03,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:03,984 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] [2021-11-07 01:11:04,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:04,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:04,200 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -935154516, now seen corresponding path program 1 times [2021-11-07 01:11:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:04,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209299428] [2021-11-07 01:11:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:04,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:04,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:04,202 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:04,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:11:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:04,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:05,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:05,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209299428] [2021-11-07 01:11:05,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209299428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:05,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364911489] [2021-11-07 01:11:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:05,111 INFO L87 Difference]: Start difference. First operand 37971 states and 67875 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:07,046 INFO L93 Difference]: Finished difference Result 75763 states and 135443 transitions. [2021-11-07 01:11:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 65 [2021-11-07 01:11:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:07,104 INFO L225 Difference]: With dead ends: 75763 [2021-11-07 01:11:07,104 INFO L226 Difference]: Without dead ends: 38051 [2021-11-07 01:11:07,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38051 states. [2021-11-07 01:11:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38051 to 37971. [2021-11-07 01:11:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37971 states, 37969 states have (on average 1.7842713792830993) internal successors, (67747), 37970 states have internal predecessors, (67747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37971 states to 37971 states and 67747 transitions. [2021-11-07 01:11:08,965 INFO L78 Accepts]: Start accepts. Automaton has 37971 states and 67747 transitions. Word has length 65 [2021-11-07 01:11:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:08,965 INFO L470 AbstractCegarLoop]: Abstraction has 37971 states and 67747 transitions. [2021-11-07 01:11:08,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37971 states and 67747 transitions. [2021-11-07 01:11:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:11:08,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:08,972 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] [2021-11-07 01:11:08,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:09,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:09,186 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:09,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1725324391, now seen corresponding path program 1 times [2021-11-07 01:11:09,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:09,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134278414] [2021-11-07 01:11:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:09,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:09,189 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:09,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:11:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:09,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:09,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:09,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:10,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:10,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134278414] [2021-11-07 01:11:10,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134278414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:10,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036347267] [2021-11-07 01:11:10,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:10,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:10,124 INFO L87 Difference]: Start difference. First operand 37971 states and 67747 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:13,350 INFO L93 Difference]: Finished difference Result 105501 states and 187869 transitions. [2021-11-07 01:11:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:11:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:13,468 INFO L225 Difference]: With dead ends: 105501 [2021-11-07 01:11:13,468 INFO L226 Difference]: Without dead ends: 67749 [2021-11-07 01:11:13,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67749 states. [2021-11-07 01:11:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67749 to 67669. [2021-11-07 01:11:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67669 states, 67667 states have (on average 1.7748681040980094) internal successors, (120100), 67668 states have internal predecessors, (120100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67669 states to 67669 states and 120100 transitions. [2021-11-07 01:11:17,186 INFO L78 Accepts]: Start accepts. Automaton has 67669 states and 120100 transitions. Word has length 65 [2021-11-07 01:11:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:17,186 INFO L470 AbstractCegarLoop]: Abstraction has 67669 states and 120100 transitions. [2021-11-07 01:11:17,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 67669 states and 120100 transitions. [2021-11-07 01:11:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:11:17,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:17,195 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] [2021-11-07 01:11:17,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:17,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,410 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1331173874, now seen corresponding path program 1 times [2021-11-07 01:11:17,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:17,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299125651] [2021-11-07 01:11:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:17,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:17,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:11:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:18,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299125651] [2021-11-07 01:11:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299125651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:18,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121966304] [2021-11-07 01:11:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:18,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:18,748 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:18,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3f42ac-1c8c-417e-a818-fa77fe3f7f12/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:11:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:11:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:19,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:20,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121966304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:20,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:20,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 01:11:20,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249940937] [2021-11-07 01:11:20,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:11:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:11:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:11:20,350 INFO L87 Difference]: Start difference. First operand 67669 states and 120100 transitions. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)