./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.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_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/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_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/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_83195814-82d2-4334-b0f0-a7758b43e421/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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:58,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:58,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:58,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:58,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:58,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:58,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:58,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:58,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:58,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:58,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:58,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:58,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:58,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:58,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:58,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:58,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:58,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:58,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:58,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:58,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:58,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:58,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:58,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:58,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:58,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:58,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:58,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:58,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:58,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:58,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:58,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:58,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:58,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:58,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:58,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:58,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:58,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:58,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:58,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:58,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:58,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:21:58,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:58,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:58,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:58,760 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:58,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:58,761 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:58,761 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:58,761 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:58,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:58,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:58,762 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:58,762 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:58,762 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:58,762 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:58,763 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:58,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:58,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:58,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:58,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:58,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:58,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:58,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:58,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:58,765 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:58,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:58,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:58,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:58,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:58,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:58,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:58,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:58,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:58,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:58,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:58,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:58,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:58,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:58,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:58,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:58,768 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_83195814-82d2-4334-b0f0-a7758b43e421/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-07 02:21:59,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:59,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:59,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:59,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:59,044 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:59,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-07 02:21:59,127 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/4a1c7a089/74f4c6b2a403406bb9943f2e5c19af8a/FLAG7c8feee2b [2021-11-07 02:21:59,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:59,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-07 02:21:59,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/4a1c7a089/74f4c6b2a403406bb9943f2e5c19af8a/FLAG7c8feee2b [2021-11-07 02:21:59,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/4a1c7a089/74f4c6b2a403406bb9943f2e5c19af8a [2021-11-07 02:21:59,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:59,975 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:59,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:59,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:59,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:59,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:59" (1/1) ... [2021-11-07 02:21:59,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5716f4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:59, skipping insertion in model container [2021-11-07 02:21:59,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:59" (1/1) ... [2021-11-07 02:21:59,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:00,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:00,637 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_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-07 02:22:00,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:00,708 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:22:00,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cc3d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:00, skipping insertion in model container [2021-11-07 02:22:00,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:00,710 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:22:00,712 INFO L168 Benchmark]: Toolchain (without parser) took 735.97 ms. Allocated memory is still 98.6 MB. Free memory was 56.1 MB in the beginning and 59.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:00,712 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 75.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:22:00,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 733.40 ms. Allocated memory is still 98.6 MB. Free memory was 55.9 MB in the beginning and 59.7 MB in the end (delta: -3.8 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:00,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory is still 75.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 733.40 ms. Allocated memory is still 98.6 MB. Free memory was 55.9 MB in the beginning and 59.7 MB in the end (delta: -3.8 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: 1621]: 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_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/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_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/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_83195814-82d2-4334-b0f0-a7758b43e421/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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:22:02,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:22:02,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:22:03,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:22:03,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:22:03,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:22:03,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:22:03,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:22:03,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:22:03,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:22:03,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:22:03,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:22:03,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:22:03,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:22:03,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:22:03,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:22:03,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:22:03,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:22:03,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:22:03,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:22:03,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:22:03,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:22:03,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:22:03,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:22:03,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:22:03,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:22:03,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:22:03,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:22:03,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:22:03,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:22:03,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:22:03,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:22:03,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:22:03,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:22:03,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:22:03,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:22:03,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:22:03,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:22:03,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:22:03,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:22:03,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:22:03,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:22:03,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:22:03,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:22:03,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:22:03,156 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:22:03,156 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:22:03,156 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:22:03,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:22:03,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:22:03,157 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:22:03,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:22:03,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:22:03,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:22:03,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:22:03,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:22:03,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:22:03,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:22:03,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:22:03,161 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:22:03,161 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:22:03,161 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:22:03,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:22:03,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:22:03,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:22:03,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:22:03,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:22:03,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:22:03,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:03,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:22:03,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:22:03,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:22:03,163 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:22:03,163 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:03,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:22:03,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:22:03,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:22:03,164 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_83195814-82d2-4334-b0f0-a7758b43e421/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-07 02:22:03,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:22:03,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:22:03,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:22:03,552 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:22:03,552 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:22:03,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-07 02:22:03,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/54f994358/61c805dccaee48059b5ee07459d7b4ca/FLAGce07f4ee9 [2021-11-07 02:22:04,349 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:22:04,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-07 02:22:04,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/54f994358/61c805dccaee48059b5ee07459d7b4ca/FLAGce07f4ee9 [2021-11-07 02:22:04,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/data/54f994358/61c805dccaee48059b5ee07459d7b4ca [2021-11-07 02:22:04,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:22:04,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:22:04,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:04,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:22:04,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:22:04,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:04" (1/1) ... [2021-11-07 02:22:04,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e969783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:04, skipping insertion in model container [2021-11-07 02:22:04,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:04" (1/1) ... [2021-11-07 02:22:04,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:04,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:05,265 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_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-07 02:22:05,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:05,329 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:22:05,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:05,456 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_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-07 02:22:05,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:05,472 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:22:05,574 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_83195814-82d2-4334-b0f0-a7758b43e421/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-07 02:22:05,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:05,620 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:22:05,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05 WrapperNode [2021-11-07 02:22:05,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:05,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:05,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:22:05,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:22:05,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:05,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:06,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:22:06,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:22:06,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:22:06,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:22:06,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:22:06,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:22:06,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:22:06,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (1/1) ... [2021-11-07 02:22:06,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:06,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:22:06,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:22:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:22:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:22:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:22:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:22:19,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:22:19,246 INFO L299 CfgBuilder]: Removed 1089 assume(true) statements. [2021-11-07 02:22:19,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:19 BoogieIcfgContainer [2021-11-07 02:22:19,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:22:19,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:22:19,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:22:19,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:22:19,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:22:04" (1/3) ... [2021-11-07 02:22:19,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5662896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:19, skipping insertion in model container [2021-11-07 02:22:19,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:05" (2/3) ... [2021-11-07 02:22:19,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5662896e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:19, skipping insertion in model container [2021-11-07 02:22:19,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:19" (3/3) ... [2021-11-07 02:22:19,264 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2021-11-07 02:22:19,269 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:22:19,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:22:19,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:22:19,361 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:22:19,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:22:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 4799 states, 4793 states have (on average 1.8919257250156478) internal successors, (9068), 4798 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:19,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:22:19,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:19,482 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] [2021-11-07 02:22:19,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -742014273, now seen corresponding path program 1 times [2021-11-07 02:22:19,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:19,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007079893] [2021-11-07 02:22:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:19,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:19,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:19,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:19,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:22:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:22:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:20,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:20,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:20,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007079893] [2021-11-07 02:22:20,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007079893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:20,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:20,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:22:20,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429146998] [2021-11-07 02:22:20,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:22:20,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:22:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:20,126 INFO L87 Difference]: Start difference. First operand has 4799 states, 4793 states have (on average 1.8919257250156478) internal successors, (9068), 4798 states have internal predecessors, (9068), 0 states have call successors, (0), 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 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:20,267 INFO L93 Difference]: Finished difference Result 4818 states and 9091 transitions. [2021-11-07 02:22:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:22:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 02:22:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:20,319 INFO L225 Difference]: With dead ends: 4818 [2021-11-07 02:22:20,319 INFO L226 Difference]: Without dead ends: 4795 [2021-11-07 02:22:20,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-11-07 02:22:20,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4795. [2021-11-07 02:22:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4790 states have (on average 1.8906054279749478) internal successors, (9056), 4794 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 9056 transitions. [2021-11-07 02:22:20,552 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 9056 transitions. Word has length 36 [2021-11-07 02:22:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:20,553 INFO L470 AbstractCegarLoop]: Abstraction has 4795 states and 9056 transitions. [2021-11-07 02:22:20,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 9056 transitions. [2021-11-07 02:22:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:22:20,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:20,558 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 02:22:20,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:20,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:20,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash -456633874, now seen corresponding path program 1 times [2021-11-07 02:22:20,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:20,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890018384] [2021-11-07 02:22:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:20,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:20,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:20,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:20,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:22:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:21,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:21,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890018384] [2021-11-07 02:22:21,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890018384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:21,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:21,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:21,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207226875] [2021-11-07 02:22:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:21,421 INFO L87 Difference]: Start difference. First operand 4795 states and 9056 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:22,008 INFO L93 Difference]: Finished difference Result 14305 states and 27025 transitions. [2021-11-07 02:22:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 02:22:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:22,074 INFO L225 Difference]: With dead ends: 14305 [2021-11-07 02:22:22,074 INFO L226 Difference]: Without dead ends: 9523 [2021-11-07 02:22:22,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-11-07 02:22:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 4795. [2021-11-07 02:22:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4790 states have (on average 1.8891440501043841) internal successors, (9049), 4794 states have internal predecessors, (9049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 9049 transitions. [2021-11-07 02:22:22,310 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 9049 transitions. Word has length 38 [2021-11-07 02:22:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:22,310 INFO L470 AbstractCegarLoop]: Abstraction has 4795 states and 9049 transitions. [2021-11-07 02:22:22,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 9049 transitions. [2021-11-07 02:22:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:22:22,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:22,314 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] [2021-11-07 02:22:22,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:22,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:22,532 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -377816655, now seen corresponding path program 1 times [2021-11-07 02:22:22,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:22,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875014871] [2021-11-07 02:22:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:22,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:22,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:22,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:22:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:22:22,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:23,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:23,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875014871] [2021-11-07 02:22:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875014871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:23,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:23,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:23,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105452173] [2021-11-07 02:22:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:23,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:23,182 INFO L87 Difference]: Start difference. First operand 4795 states and 9049 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:24,959 INFO L93 Difference]: Finished difference Result 33040 states and 62395 transitions. [2021-11-07 02:22:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:22:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:22:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:25,091 INFO L225 Difference]: With dead ends: 33040 [2021-11-07 02:22:25,092 INFO L226 Difference]: Without dead ends: 28267 [2021-11-07 02:22:25,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28267 states. [2021-11-07 02:22:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28267 to 4773. [2021-11-07 02:22:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4768 states have (on average 1.8871644295302012) internal successors, (8998), 4772 states have internal predecessors, (8998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 8998 transitions. [2021-11-07 02:22:25,632 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 8998 transitions. Word has length 44 [2021-11-07 02:22:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:25,632 INFO L470 AbstractCegarLoop]: Abstraction has 4773 states and 8998 transitions. [2021-11-07 02:22:25,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 8998 transitions. [2021-11-07 02:22:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:22:25,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:25,638 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] [2021-11-07 02:22:25,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,855 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1166518384, now seen corresponding path program 1 times [2021-11-07 02:22:25,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:25,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012897163] [2021-11-07 02:22:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:25,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:25,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:25,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:22:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:26,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:26,344 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 02:22:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:26,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:26,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012897163] [2021-11-07 02:22:26,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012897163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:26,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:26,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:26,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348715544] [2021-11-07 02:22:26,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:26,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:26,460 INFO L87 Difference]: Start difference. First operand 4773 states and 8998 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:27,007 INFO L93 Difference]: Finished difference Result 14216 states and 26829 transitions. [2021-11-07 02:22:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:27,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:22:27,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:27,033 INFO L225 Difference]: With dead ends: 14216 [2021-11-07 02:22:27,033 INFO L226 Difference]: Without dead ends: 9465 [2021-11-07 02:22:27,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9465 states. [2021-11-07 02:22:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9465 to 4773. [2021-11-07 02:22:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4768 states have (on average 1.8848573825503356) internal successors, (8987), 4772 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 8987 transitions. [2021-11-07 02:22:27,385 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 8987 transitions. Word has length 46 [2021-11-07 02:22:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:27,385 INFO L470 AbstractCegarLoop]: Abstraction has 4773 states and 8987 transitions. [2021-11-07 02:22:27,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 8987 transitions. [2021-11-07 02:22:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:22:27,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:27,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:27,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:27,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:27,601 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash -886483077, now seen corresponding path program 1 times [2021-11-07 02:22:27,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:27,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847821258] [2021-11-07 02:22:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:27,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:27,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:27,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:27,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:22:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:22:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:28,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:28,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:28,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847821258] [2021-11-07 02:22:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847821258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:28,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:22:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964206737] [2021-11-07 02:22:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:28,324 INFO L87 Difference]: Start difference. First operand 4773 states and 8987 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 02:22:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:31,257 INFO L93 Difference]: Finished difference Result 51747 states and 97691 transitions. [2021-11-07 02:22:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:22:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 52 [2021-11-07 02:22:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:31,407 INFO L225 Difference]: With dead ends: 51747 [2021-11-07 02:22:31,407 INFO L226 Difference]: Without dead ends: 46999 [2021-11-07 02:22:31,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:22:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46999 states. [2021-11-07 02:22:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46999 to 4775. [2021-11-07 02:22:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4775 states, 4770 states have (on average 1.8834381551362684) internal successors, (8984), 4774 states have internal predecessors, (8984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 8984 transitions. [2021-11-07 02:22:32,064 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 8984 transitions. Word has length 52 [2021-11-07 02:22:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:32,065 INFO L470 AbstractCegarLoop]: Abstraction has 4775 states and 8984 transitions. [2021-11-07 02:22:32,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 02:22:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 8984 transitions. [2021-11-07 02:22:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:22:32,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:32,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:32,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:22:32,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1609743816, now seen corresponding path program 1 times [2021-11-07 02:22:32,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:32,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291846012] [2021-11-07 02:22:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:32,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:32,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:22:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:32,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:33,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:33,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291846012] [2021-11-07 02:22:33,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291846012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:33,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:33,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:22:33,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788220880] [2021-11-07 02:22:33,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:33,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:33,048 INFO L87 Difference]: Start difference. First operand 4775 states and 8984 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:35,902 INFO L93 Difference]: Finished difference Result 51715 states and 97612 transitions. [2021-11-07 02:22:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:22:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:22:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:36,033 INFO L225 Difference]: With dead ends: 51715 [2021-11-07 02:22:36,034 INFO L226 Difference]: Without dead ends: 46967 [2021-11-07 02:22:36,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:22:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46967 states. [2021-11-07 02:22:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46967 to 4779. [2021-11-07 02:22:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4774 states have (on average 1.8824884792626728) internal successors, (8987), 4778 states have internal predecessors, (8987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 8987 transitions. [2021-11-07 02:22:36,547 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 8987 transitions. Word has length 54 [2021-11-07 02:22:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:36,548 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 8987 transitions. [2021-11-07 02:22:36,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 8987 transitions. [2021-11-07 02:22:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:22:36,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:36,550 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:36,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:22:36,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:36,764 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1510649093, now seen corresponding path program 1 times [2021-11-07 02:22:36,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:36,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644802003] [2021-11-07 02:22:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:36,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:36,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:36,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:22:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:37,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:37,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:37,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644802003] [2021-11-07 02:22:37,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644802003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:37,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:37,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:37,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191205767] [2021-11-07 02:22:37,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:37,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:37,436 INFO L87 Difference]: Start difference. First operand 4779 states and 8987 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:37,774 INFO L93 Difference]: Finished difference Result 9506 states and 17905 transitions. [2021-11-07 02:22:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:22:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:37,783 INFO L225 Difference]: With dead ends: 9506 [2021-11-07 02:22:37,783 INFO L226 Difference]: Without dead ends: 4758 [2021-11-07 02:22:37,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-11-07 02:22:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 4758. [2021-11-07 02:22:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4758 states, 4753 states have (on average 1.8828108563012833) internal successors, (8949), 4757 states have internal predecessors, (8949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 8949 transitions. [2021-11-07 02:22:38,040 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 8949 transitions. Word has length 56 [2021-11-07 02:22:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:38,043 INFO L470 AbstractCegarLoop]: Abstraction has 4758 states and 8949 transitions. [2021-11-07 02:22:38,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 8949 transitions. [2021-11-07 02:22:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:22:38,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:38,047 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:38,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:38,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:38,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash -767688797, now seen corresponding path program 1 times [2021-11-07 02:22:38,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:38,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389993759] [2021-11-07 02:22:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:38,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:38,263 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:38,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:22:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:22:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:38,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:38,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:38,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389993759] [2021-11-07 02:22:38,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389993759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:38,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564762465] [2021-11-07 02:22:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:38,914 INFO L87 Difference]: Start difference. First operand 4758 states and 8949 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:39,124 INFO L93 Difference]: Finished difference Result 9450 states and 17808 transitions. [2021-11-07 02:22:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:22:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:39,133 INFO L225 Difference]: With dead ends: 9450 [2021-11-07 02:22:39,134 INFO L226 Difference]: Without dead ends: 4733 [2021-11-07 02:22:39,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:22:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-11-07 02:22:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4733. [2021-11-07 02:22:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 4728 states have (on average 1.8834602368866329) internal successors, (8905), 4732 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 8905 transitions. [2021-11-07 02:22:39,388 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 8905 transitions. Word has length 57 [2021-11-07 02:22:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:39,388 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 8905 transitions. [2021-11-07 02:22:39,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 8905 transitions. [2021-11-07 02:22:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:22:39,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:39,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:39,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:39,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 835157740, now seen corresponding path program 1 times [2021-11-07 02:22:39,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:39,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869204425] [2021-11-07 02:22:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:39,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:39,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:39,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:39,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:22:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:40,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:40,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:40,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:40,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869204425] [2021-11-07 02:22:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869204425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:40,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:40,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611965815] [2021-11-07 02:22:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:40,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:40,291 INFO L87 Difference]: Start difference. First operand 4733 states and 8905 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:22:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:40,612 INFO L93 Difference]: Finished difference Result 9425 states and 17764 transitions. [2021-11-07 02:22:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:40,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 58 [2021-11-07 02:22:40,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:40,620 INFO L225 Difference]: With dead ends: 9425 [2021-11-07 02:22:40,620 INFO L226 Difference]: Without dead ends: 4730 [2021-11-07 02:22:40,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-11-07 02:22:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 4730. [2021-11-07 02:22:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4725 states have (on average 1.882962962962963) internal successors, (8897), 4729 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 8897 transitions. [2021-11-07 02:22:40,964 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 8897 transitions. Word has length 58 [2021-11-07 02:22:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:40,964 INFO L470 AbstractCegarLoop]: Abstraction has 4730 states and 8897 transitions. [2021-11-07 02:22:40,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 02:22:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 8897 transitions. [2021-11-07 02:22:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:22:40,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:40,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:40,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:41,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:41,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash -643906339, now seen corresponding path program 1 times [2021-11-07 02:22:41,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:41,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941877262] [2021-11-07 02:22:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:41,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:41,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:41,187 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:41,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:22:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:22:41,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:41,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:41,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:41,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941877262] [2021-11-07 02:22:41,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941877262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:41,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:41,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:22:41,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800857372] [2021-11-07 02:22:41,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:41,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:41,916 INFO L87 Difference]: Start difference. First operand 4730 states and 8897 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:42,253 INFO L93 Difference]: Finished difference Result 9416 states and 17746 transitions. [2021-11-07 02:22:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:22:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:42,260 INFO L225 Difference]: With dead ends: 9416 [2021-11-07 02:22:42,261 INFO L226 Difference]: Without dead ends: 4728 [2021-11-07 02:22:42,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:42,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2021-11-07 02:22:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4728. [2021-11-07 02:22:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4723 states have (on average 1.8824899428329451) internal successors, (8891), 4727 states have internal predecessors, (8891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 8891 transitions. [2021-11-07 02:22:42,493 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 8891 transitions. Word has length 59 [2021-11-07 02:22:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 8891 transitions. [2021-11-07 02:22:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 8891 transitions. [2021-11-07 02:22:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:22:42,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:42,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:42,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:42,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:42,701 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash -958302959, now seen corresponding path program 1 times [2021-11-07 02:22:42,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:42,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550855868] [2021-11-07 02:22:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:42,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:42,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:42,703 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:42,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:22:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:43,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:43,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:43,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550855868] [2021-11-07 02:22:43,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550855868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:43,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:43,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:22:43,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919818004] [2021-11-07 02:22:43,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:43,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:43,522 INFO L87 Difference]: Start difference. First operand 4728 states and 8891 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:43,867 INFO L93 Difference]: Finished difference Result 9409 states and 17731 transitions. [2021-11-07 02:22:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:43,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:22:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:43,874 INFO L225 Difference]: With dead ends: 9409 [2021-11-07 02:22:43,874 INFO L226 Difference]: Without dead ends: 4726 [2021-11-07 02:22:43,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-11-07 02:22:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4726. [2021-11-07 02:22:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4726 states, 4721 states have (on average 1.8820165219233214) internal successors, (8885), 4725 states have internal predecessors, (8885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4726 states to 4726 states and 8885 transitions. [2021-11-07 02:22:44,110 INFO L78 Accepts]: Start accepts. Automaton has 4726 states and 8885 transitions. Word has length 60 [2021-11-07 02:22:44,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:44,110 INFO L470 AbstractCegarLoop]: Abstraction has 4726 states and 8885 transitions. [2021-11-07 02:22:44,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4726 states and 8885 transitions. [2021-11-07 02:22:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:22:44,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:44,112 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 02:22:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:44,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:44,316 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1619075218, now seen corresponding path program 1 times [2021-11-07 02:22:44,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:44,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768330620] [2021-11-07 02:22:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:44,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:44,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:44,318 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:44,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:22:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:44,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:45,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:45,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:45,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768330620] [2021-11-07 02:22:45,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768330620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:45,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:45,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:22:45,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786001623] [2021-11-07 02:22:45,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:45,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:45,512 INFO L87 Difference]: Start difference. First operand 4726 states and 8885 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:46,401 INFO L93 Difference]: Finished difference Result 12910 states and 24357 transitions. [2021-11-07 02:22:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:22:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:46,416 INFO L225 Difference]: With dead ends: 12910 [2021-11-07 02:22:46,417 INFO L226 Difference]: Without dead ends: 10515 [2021-11-07 02:22:46,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10515 states. [2021-11-07 02:22:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10515 to 6286. [2021-11-07 02:22:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 6281 states have (on average 1.8852093615666294) internal successors, (11841), 6285 states have internal predecessors, (11841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 11841 transitions. [2021-11-07 02:22:46,773 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 11841 transitions. Word has length 61 [2021-11-07 02:22:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:46,773 INFO L470 AbstractCegarLoop]: Abstraction has 6286 states and 11841 transitions. [2021-11-07 02:22:46,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 11841 transitions. [2021-11-07 02:22:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:22:46,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:46,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:46,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:22:46,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:46,992 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash -86892149, now seen corresponding path program 1 times [2021-11-07 02:22:46,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:46,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202366115] [2021-11-07 02:22:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:46,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:47,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:22:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:47,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:47,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:47,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202366115] [2021-11-07 02:22:47,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202366115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:47,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:47,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:22:47,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534966736] [2021-11-07 02:22:47,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:47,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:47,968 INFO L87 Difference]: Start difference. First operand 6286 states and 11841 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:48,706 INFO L93 Difference]: Finished difference Result 12014 states and 22430 transitions. [2021-11-07 02:22:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:22:48,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:22:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:48,715 INFO L225 Difference]: With dead ends: 12014 [2021-11-07 02:22:48,715 INFO L226 Difference]: Without dead ends: 6937 [2021-11-07 02:22:48,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6937 states. [2021-11-07 02:22:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6937 to 4671. [2021-11-07 02:22:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4666 states have (on average 1.8756965280754394) internal successors, (8752), 4670 states have internal predecessors, (8752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 8752 transitions. [2021-11-07 02:22:48,948 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 8752 transitions. Word has length 74 [2021-11-07 02:22:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:48,949 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 8752 transitions. [2021-11-07 02:22:48,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 8752 transitions. [2021-11-07 02:22:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:22:48,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:48,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:48,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:49,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:49,159 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1319552578, now seen corresponding path program 1 times [2021-11-07 02:22:49,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:49,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136503615] [2021-11-07 02:22:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:49,160 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:49,163 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:49,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:22:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:49,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:50,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:50,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136503615] [2021-11-07 02:22:50,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136503615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:50,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:50,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:22:50,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957113646] [2021-11-07 02:22:50,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:22:50,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:22:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:22:50,221 INFO L87 Difference]: Start difference. First operand 4671 states and 8752 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:52,604 INFO L93 Difference]: Finished difference Result 18720 states and 35077 transitions. [2021-11-07 02:22:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:22:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:22:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:52,629 INFO L225 Difference]: With dead ends: 18720 [2021-11-07 02:22:52,630 INFO L226 Difference]: Without dead ends: 14112 [2021-11-07 02:22:52,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14112 states. [2021-11-07 02:22:52,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14112 to 4679. [2021-11-07 02:22:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4674 states have (on average 1.8741976893453145) internal successors, (8760), 4678 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 8760 transitions. [2021-11-07 02:22:52,922 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 8760 transitions. Word has length 75 [2021-11-07 02:22:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 4679 states and 8760 transitions. [2021-11-07 02:22:52,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 8760 transitions. [2021-11-07 02:22:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:22:52,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:52,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:52,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:53,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:53,140 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash 690188848, now seen corresponding path program 1 times [2021-11-07 02:22:53,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:53,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407227427] [2021-11-07 02:22:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:53,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:53,143 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:53,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:22:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:22:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:53,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:54,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:54,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407227427] [2021-11-07 02:22:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407227427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:54,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:54,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:22:54,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764665164] [2021-11-07 02:22:54,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:22:54,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:22:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:22:54,126 INFO L87 Difference]: Start difference. First operand 4679 states and 8760 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:03,680 INFO L93 Difference]: Finished difference Result 13101 states and 24506 transitions. [2021-11-07 02:23:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:23:03,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:23:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:03,691 INFO L225 Difference]: With dead ends: 13101 [2021-11-07 02:23:03,692 INFO L226 Difference]: Without dead ends: 9804 [2021-11-07 02:23:03,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2021-11-07 02:23:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 8757. [2021-11-07 02:23:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8752 states have (on average 1.8777422303473492) internal successors, (16434), 8756 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 16434 transitions. [2021-11-07 02:23:04,144 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 16434 transitions. Word has length 76 [2021-11-07 02:23:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:04,145 INFO L470 AbstractCegarLoop]: Abstraction has 8757 states and 16434 transitions. [2021-11-07 02:23:04,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 16434 transitions. [2021-11-07 02:23:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:23:04,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:04,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:04,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:23:04,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:04,364 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:23:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash -577171700, now seen corresponding path program 1 times [2021-11-07 02:23:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:04,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691137590] [2021-11-07 02:23:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:04,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:04,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:04,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:23:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:05,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:05,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:05,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691137590] [2021-11-07 02:23:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691137590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:05,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:05,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:05,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670630244] [2021-11-07 02:23:05,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:05,547 INFO L87 Difference]: Start difference. First operand 8757 states and 16434 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:08,164 INFO L93 Difference]: Finished difference Result 17071 states and 31880 transitions. [2021-11-07 02:23:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:23:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:08,178 INFO L225 Difference]: With dead ends: 17071 [2021-11-07 02:23:08,178 INFO L226 Difference]: Without dead ends: 9688 [2021-11-07 02:23:08,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9688 states. [2021-11-07 02:23:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9688 to 8689. [2021-11-07 02:23:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8684 states have (on average 1.8666513127590971) internal successors, (16210), 8688 states have internal predecessors, (16210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 16210 transitions. [2021-11-07 02:23:08,604 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 16210 transitions. Word has length 77 [2021-11-07 02:23:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:08,604 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 16210 transitions. [2021-11-07 02:23:08,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 16210 transitions. [2021-11-07 02:23:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:23:08,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:08,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:08,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:08,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,812 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:23:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1667362408, now seen corresponding path program 1 times [2021-11-07 02:23:08,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:08,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313687711] [2021-11-07 02:23:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:08,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:08,814 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:08,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:23:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:09,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:09,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:09,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313687711] [2021-11-07 02:23:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313687711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:09,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:09,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:23:09,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559136871] [2021-11-07 02:23:09,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:23:09,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:23:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:09,910 INFO L87 Difference]: Start difference. First operand 8689 states and 16210 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:12,946 INFO L93 Difference]: Finished difference Result 63260 states and 118401 transitions. [2021-11-07 02:23:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:23:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:23:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:13,024 INFO L225 Difference]: With dead ends: 63260 [2021-11-07 02:23:13,025 INFO L226 Difference]: Without dead ends: 54630 [2021-11-07 02:23:13,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54630 states. [2021-11-07 02:23:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54630 to 16353. [2021-11-07 02:23:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16353 states, 16348 states have (on average 1.868363102520186) internal successors, (30544), 16352 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16353 states to 16353 states and 30544 transitions. [2021-11-07 02:23:14,025 INFO L78 Accepts]: Start accepts. Automaton has 16353 states and 30544 transitions. Word has length 78 [2021-11-07 02:23:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:14,026 INFO L470 AbstractCegarLoop]: Abstraction has 16353 states and 30544 transitions. [2021-11-07 02:23:14,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16353 states and 30544 transitions. [2021-11-07 02:23:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:23:14,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:14,027 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:14,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:14,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:14,230 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:23:14,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1801375914, now seen corresponding path program 1 times [2021-11-07 02:23:14,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:14,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30612399] [2021-11-07 02:23:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:14,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:14,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:14,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:14,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:23:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:14,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:15,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:15,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30612399] [2021-11-07 02:23:15,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30612399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:15,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:15,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:15,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143845215] [2021-11-07 02:23:15,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:15,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:15,380 INFO L87 Difference]: Start difference. First operand 16353 states and 30544 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:17,711 INFO L93 Difference]: Finished difference Result 59558 states and 111491 transitions. [2021-11-07 02:23:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:23:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:17,774 INFO L225 Difference]: With dead ends: 59558 [2021-11-07 02:23:17,774 INFO L226 Difference]: Without dead ends: 47746 [2021-11-07 02:23:17,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47746 states. [2021-11-07 02:23:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47746 to 27608. [2021-11-07 02:23:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27608 states, 27603 states have (on average 1.8705213201463609) internal successors, (51632), 27607 states have internal predecessors, (51632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27608 states to 27608 states and 51632 transitions. [2021-11-07 02:23:19,460 INFO L78 Accepts]: Start accepts. Automaton has 27608 states and 51632 transitions. Word has length 78 [2021-11-07 02:23:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:19,461 INFO L470 AbstractCegarLoop]: Abstraction has 27608 states and 51632 transitions. [2021-11-07 02:23:19,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 27608 states and 51632 transitions. [2021-11-07 02:23:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:23:19,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:19,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:19,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:19,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,677 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:23:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -796251040, now seen corresponding path program 1 times [2021-11-07 02:23:19,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:19,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691883545] [2021-11-07 02:23:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:19,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:19,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:19,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:19,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:23:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:20,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:20,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:20,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691883545] [2021-11-07 02:23:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691883545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:20,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:23:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064210008] [2021-11-07 02:23:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:20,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:23:20,967 INFO L87 Difference]: Start difference. First operand 27608 states and 51632 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:30,744 INFO L93 Difference]: Finished difference Result 174458 states and 327003 transitions. [2021-11-07 02:23:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:23:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:23:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:30,966 INFO L225 Difference]: With dead ends: 174458 [2021-11-07 02:23:30,966 INFO L226 Difference]: Without dead ends: 151391 [2021-11-07 02:23:31,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151391 states. [2021-11-07 02:23:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151391 to 47946. [2021-11-07 02:23:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47946 states, 47941 states have (on average 1.8723013704344924) internal successors, (89760), 47945 states have internal predecessors, (89760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47946 states to 47946 states and 89760 transitions. [2021-11-07 02:23:34,962 INFO L78 Accepts]: Start accepts. Automaton has 47946 states and 89760 transitions. Word has length 80 [2021-11-07 02:23:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 47946 states and 89760 transitions. [2021-11-07 02:23:34,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 47946 states and 89760 transitions. [2021-11-07 02:23:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:23:34,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:34,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:34,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:35,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:35,165 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:23:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1679141464, now seen corresponding path program 1 times [2021-11-07 02:23:35,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:35,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662638929] [2021-11-07 02:23:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:35,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:35,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:35,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83195814-82d2-4334-b0f0-a7758b43e421/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:23:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:35,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:36,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:36,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662638929] [2021-11-07 02:23:36,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662638929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:36,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:36,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:23:36,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624214034] [2021-11-07 02:23:36,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:36,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:36,332 INFO L87 Difference]: Start difference. First operand 47946 states and 89760 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:39,546 INFO L93 Difference]: Finished difference Result 91483 states and 171274 transitions. [2021-11-07 02:23:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 87 [2021-11-07 02:23:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:39,612 INFO L225 Difference]: With dead ends: 91483 [2021-11-07 02:23:39,612 INFO L226 Difference]: Without dead ends: 47961 [2021-11-07 02:23:39,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47961 states.