./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs --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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:14,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:14,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:14,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:14,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:14,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:14,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:14,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:14,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:14,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:14,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:14,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:14,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:14,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:14,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:14,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:14,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:14,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:14,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:14,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:14,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:14,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:14,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:14,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:14,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:14,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:14,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:14,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:14,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:14,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:14,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:14,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:14,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:14,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:14,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:14,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:14,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:14,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:14,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:14,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:14,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:14,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:45:14,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:14,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:14,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:14,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:14,607 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:14,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:14,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:14,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:45:14,608 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:14,608 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:14,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:45:14,610 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:45:14,610 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:14,610 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:45:14,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:45:14,611 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:45:14,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:14,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:14,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:45:14,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:14,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:14,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:14,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:14,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:14,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:14,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:14,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:14,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:14,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:14,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:14,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:14,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:14,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:14,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:14,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:14,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:45:14,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:45:14,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:14,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:14,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:14,619 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-19 15:45:14,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:14,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:14,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:14,982 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:14,983 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:14,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-19 15:45:15,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/d07b111d2/cd4d0ab0719b4b5f8e6ae8af266fd737/FLAG38e84291b [2021-11-19 15:45:15,753 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:15,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-19 15:45:15,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/d07b111d2/cd4d0ab0719b4b5f8e6ae8af266fd737/FLAG38e84291b [2021-11-19 15:45:15,890 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/d07b111d2/cd4d0ab0719b4b5f8e6ae8af266fd737 [2021-11-19 15:45:15,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:15,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:15,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:15,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:15,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:15,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:15" (1/1) ... [2021-11-19 15:45:15,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4517b103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:15, skipping insertion in model container [2021-11-19 15:45:15,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:15" (1/1) ... [2021-11-19 15:45:15,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:16,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:16,241 WARN L230 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-19 15:45:16,679 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:16,695 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) [2021-11-19 15:45:16,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@162996ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:16, skipping insertion in model container [2021-11-19 15:45:16,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:16,697 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:45:16,699 INFO L158 Benchmark]: Toolchain (without parser) took 801.16ms. Allocated memory is still 121.6MB. Free memory was 82.0MB in the beginning and 82.8MB in the end (delta: -832.7kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 15:45:16,701 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory was 101.1MB in the beginning and 101.0MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:45:16,702 INFO L158 Benchmark]: CACSL2BoogieTranslator took 780.84ms. Allocated memory is still 121.6MB. Free memory was 81.8MB in the beginning and 82.8MB in the end (delta: -1.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 15:45:16,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory was 101.1MB in the beginning and 101.0MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 780.84ms. Allocated memory is still 121.6MB. Free memory was 81.8MB in the beginning and 82.8MB in the end (delta: -1.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 404]: 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs --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 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:18,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:18,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:18,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:18,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:18,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:18,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:19,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:19,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:19,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:19,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:19,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:19,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:19,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:19,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:19,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:19,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:19,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:19,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:19,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:19,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:19,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:19,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:19,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:19,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:19,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:19,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:19,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:19,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:19,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:19,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:19,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:19,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:19,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:19,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:19,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:19,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:19,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:19,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:19,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:19,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:19,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:45:19,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:19,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:19,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:19,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:19,138 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:19,138 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:19,138 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:19,138 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:19,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:19,139 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:19,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:19,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:19,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:19,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:19,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:19,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:19,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:19,143 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:19,144 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:45:19,144 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:45:19,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:19,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:19,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:19,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:19,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:19,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:45:19,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:19,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:19,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:19,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:19,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:19,147 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:45:19,147 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:19,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:19,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:19,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:19,149 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8190dbbeca15ebdc96e247bb91a06680a00a60089c25180495df59d4a11849af [2021-11-19 15:45:19,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:19,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:19,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:19,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:19,589 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:19,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-19 15:45:19,667 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/7e35bebdf/87a9d544b9114e14bead7362f2197260/FLAGac01db5fa [2021-11-19 15:45:20,395 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:20,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c [2021-11-19 15:45:20,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/7e35bebdf/87a9d544b9114e14bead7362f2197260/FLAGac01db5fa [2021-11-19 15:45:20,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/data/7e35bebdf/87a9d544b9114e14bead7362f2197260 [2021-11-19 15:45:20,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:20,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:20,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:20,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:20,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:20,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:20" (1/1) ... [2021-11-19 15:45:20,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649d606f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:20, skipping insertion in model container [2021-11-19 15:45:20,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:20" (1/1) ... [2021-11-19 15:45:20,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:20,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:20,862 WARN L230 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-19 15:45:21,272 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:21,293 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:45:21,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:21,348 WARN L230 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-19 15:45:21,508 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:21,513 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:45:21,526 WARN L230 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_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/sv-benchmarks/c/product-lines/elevator_spec2_product01.cil.c[1545,1558] [2021-11-19 15:45:21,613 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:21,645 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:45:21,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21 WrapperNode [2021-11-19 15:45:21,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:21,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:45:21,647 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:45:21,647 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:45:21,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,770 INFO L137 Inliner]: procedures = 90, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 714 [2021-11-19 15:45:21,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:45:21,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:45:21,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:45:21,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:45:21,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:45:21,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:45:21,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:45:21,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:45:21,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (1/1) ... [2021-11-19 15:45:21,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:21,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:45:21,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:45:21,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:45:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:45:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 15:45:21,951 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 15:45:21,951 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 15:45:21,951 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 15:45:21,951 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 15:45:21,951 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 15:45:21,951 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 15:45:21,952 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 15:45:21,952 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 15:45:21,952 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 15:45:21,952 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 15:45:21,965 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 15:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 15:45:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 15:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 15:45:21,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 15:45:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 15:45:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 15:45:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 15:45:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 15:45:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 15:45:21,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 15:45:21,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:45:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 15:45:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 15:45:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 15:45:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 15:45:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 15:45:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 15:45:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 15:45:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 15:45:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 15:45:21,970 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 15:45:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 15:45:21,970 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 15:45:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 15:45:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 15:45:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 15:45:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 15:45:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:45:21,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:45:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 15:45:21,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 15:45:22,118 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:45:22,120 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:45:23,239 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:45:23,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:45:23,252 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:45:23,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:23 BoogieIcfgContainer [2021-11-19 15:45:23,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:45:23,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:45:23,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:45:23,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:45:23,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:45:20" (1/3) ... [2021-11-19 15:45:23,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c26a87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:23, skipping insertion in model container [2021-11-19 15:45:23,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:21" (2/3) ... [2021-11-19 15:45:23,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c26a87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:23, skipping insertion in model container [2021-11-19 15:45:23,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:23" (3/3) ... [2021-11-19 15:45:23,264 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2021-11-19 15:45:23,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:45:23,270 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:45:23,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:45:23,331 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 [2021-11-19 15:45:23,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:45:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 517 states, 409 states have (on average 1.7163814180929096) internal successors, (702), 430 states have internal predecessors, (702), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-19 15:45:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 15:45:23,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:23,399 INFO L514 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] [2021-11-19 15:45:23,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash 998203465, now seen corresponding path program 1 times [2021-11-19 15:45:23,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:23,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582719492] [2021-11-19 15:45:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:23,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:23,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:23,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:45:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:45:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:24,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:24,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:24,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582719492] [2021-11-19 15:45:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582719492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:24,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:24,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:45:24,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016812116] [2021-11-19 15:45:24,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:24,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:45:24,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:45:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:45:24,378 INFO L87 Difference]: Start difference. First operand has 517 states, 409 states have (on average 1.7163814180929096) internal successors, (702), 430 states have internal predecessors, (702), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 15:45:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:24,469 INFO L93 Difference]: Finished difference Result 538 states and 904 transitions. [2021-11-19 15:45:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:45:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 74 [2021-11-19 15:45:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:24,501 INFO L225 Difference]: With dead ends: 538 [2021-11-19 15:45:24,501 INFO L226 Difference]: Without dead ends: 509 [2021-11-19 15:45:24,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:45:24,510 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:24,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:45:24,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-19 15:45:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2021-11-19 15:45:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.7146401985111663) internal successors, (691), 422 states have internal predecessors, (691), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 858 transitions. [2021-11-19 15:45:24,641 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 858 transitions. Word has length 74 [2021-11-19 15:45:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:24,643 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 858 transitions. [2021-11-19 15:45:24,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 15:45:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 858 transitions. [2021-11-19 15:45:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 15:45:24,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:24,655 INFO L514 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] [2021-11-19 15:45:24,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:45:24,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:24,860 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1118211112, now seen corresponding path program 1 times [2021-11-19 15:45:24,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:24,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604047218] [2021-11-19 15:45:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:24,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:24,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:24,864 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:24,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:45:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:25,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:25,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604047218] [2021-11-19 15:45:25,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604047218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:25,687 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:25,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:45:25,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319350860] [2021-11-19 15:45:25,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:25,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:25,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:25,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:25,698 INFO L87 Difference]: Start difference. First operand 509 states and 858 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:25,825 INFO L93 Difference]: Finished difference Result 1002 states and 1694 transitions. [2021-11-19 15:45:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:45:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 76 [2021-11-19 15:45:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:25,833 INFO L225 Difference]: With dead ends: 1002 [2021-11-19 15:45:25,833 INFO L226 Difference]: Without dead ends: 509 [2021-11-19 15:45:25,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:25,840 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 30 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2531 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:25,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 2531 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:45:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-19 15:45:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2021-11-19 15:45:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 403 states have (on average 1.6997518610421836) internal successors, (685), 422 states have internal predecessors, (685), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 852 transitions. [2021-11-19 15:45:25,883 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 852 transitions. Word has length 76 [2021-11-19 15:45:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:25,883 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 852 transitions. [2021-11-19 15:45:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 852 transitions. [2021-11-19 15:45:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:45:25,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:25,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:25,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:26,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:26,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash -88873554, now seen corresponding path program 1 times [2021-11-19 15:45:26,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:26,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214048416] [2021-11-19 15:45:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:26,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:26,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:26,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:26,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:45:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:45:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:26,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:27,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:27,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214048416] [2021-11-19 15:45:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214048416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:27,055 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:27,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 15:45:27,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872404631] [2021-11-19 15:45:27,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:27,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 15:45:27,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 15:45:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:45:27,062 INFO L87 Difference]: Start difference. First operand 509 states and 852 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:27,304 INFO L93 Difference]: Finished difference Result 960 states and 1611 transitions. [2021-11-19 15:45:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 81 [2021-11-19 15:45:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:27,314 INFO L225 Difference]: With dead ends: 960 [2021-11-19 15:45:27,315 INFO L226 Difference]: Without dead ends: 503 [2021-11-19 15:45:27,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:45:27,321 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 117 mSDsluCounter, 7379 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 8218 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:27,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 8218 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-19 15:45:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2021-11-19 15:45:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.6926952141057934) internal successors, (672), 416 states have internal predecessors, (672), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:27,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 839 transitions. [2021-11-19 15:45:27,370 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 839 transitions. Word has length 81 [2021-11-19 15:45:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:27,370 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 839 transitions. [2021-11-19 15:45:27,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 839 transitions. [2021-11-19 15:45:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 15:45:27,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:27,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:27,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:27,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:27,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1421004449, now seen corresponding path program 1 times [2021-11-19 15:45:27,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:27,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469093936] [2021-11-19 15:45:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:27,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:27,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:27,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:45:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:28,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:28,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:28,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469093936] [2021-11-19 15:45:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469093936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:28,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:28,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:45:28,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048561143] [2021-11-19 15:45:28,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:28,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:28,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:28,366 INFO L87 Difference]: Start difference. First operand 503 states and 839 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:28,546 INFO L93 Difference]: Finished difference Result 963 states and 1612 transitions. [2021-11-19 15:45:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:45:28,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-19 15:45:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:28,554 INFO L225 Difference]: With dead ends: 963 [2021-11-19 15:45:28,554 INFO L226 Difference]: Without dead ends: 503 [2021-11-19 15:45:28,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:28,559 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 206 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:28,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1600 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-19 15:45:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2021-11-19 15:45:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 397 states have (on average 1.6322418136020151) internal successors, (648), 416 states have internal predecessors, (648), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 815 transitions. [2021-11-19 15:45:28,590 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 815 transitions. Word has length 82 [2021-11-19 15:45:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:28,591 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 815 transitions. [2021-11-19 15:45:28,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 815 transitions. [2021-11-19 15:45:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:45:28,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:28,596 INFO L514 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] [2021-11-19 15:45:28,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:28,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:28,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1311609382, now seen corresponding path program 1 times [2021-11-19 15:45:28,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:28,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275290216] [2021-11-19 15:45:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:28,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:28,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:28,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:45:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:45:29,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:29,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:29,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275290216] [2021-11-19 15:45:29,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275290216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:29,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:29,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 15:45:29,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994298238] [2021-11-19 15:45:29,633 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:29,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:45:29,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:45:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:45:29,635 INFO L87 Difference]: Start difference. First operand 503 states and 815 transitions. Second operand has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:45:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:29,763 INFO L93 Difference]: Finished difference Result 954 states and 1574 transitions. [2021-11-19 15:45:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2021-11-19 15:45:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:29,770 INFO L225 Difference]: With dead ends: 954 [2021-11-19 15:45:29,770 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 15:45:29,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:29,777 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 117 mSDsluCounter, 3952 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4755 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:29,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 4755 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:29,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 15:45:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-11-19 15:45:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6569148936170213) internal successors, (623), 395 states have internal predecessors, (623), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 790 transitions. [2021-11-19 15:45:29,810 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 790 transitions. Word has length 84 [2021-11-19 15:45:29,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:29,810 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 790 transitions. [2021-11-19 15:45:29,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 15:45:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 790 transitions. [2021-11-19 15:45:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 15:45:29,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:29,815 INFO L514 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] [2021-11-19 15:45:29,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:30,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:30,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1685770939, now seen corresponding path program 1 times [2021-11-19 15:45:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000854893] [2021-11-19 15:45:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:30,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:30,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:30,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:45:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:30,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:30,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:30,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000854893] [2021-11-19 15:45:30,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000854893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:30,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:30,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:45:30,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233783987] [2021-11-19 15:45:30,965 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:30,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:45:30,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:45:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:45:30,967 INFO L87 Difference]: Start difference. First operand 482 states and 790 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:31,139 INFO L93 Difference]: Finished difference Result 927 states and 1538 transitions. [2021-11-19 15:45:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:45:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-19 15:45:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:31,145 INFO L225 Difference]: With dead ends: 927 [2021-11-19 15:45:31,145 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 15:45:31,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:45:31,149 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 46 mSDsluCounter, 5400 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:31,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 6175 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 15:45:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-11-19 15:45:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 376 states have (on average 1.6542553191489362) internal successors, (622), 395 states have internal predecessors, (622), 86 states have call successors, (86), 20 states have call predecessors, (86), 19 states have return successors, (81), 79 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-19 15:45:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 789 transitions. [2021-11-19 15:45:31,174 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 789 transitions. Word has length 87 [2021-11-19 15:45:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:31,175 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 789 transitions. [2021-11-19 15:45:31,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 15:45:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 789 transitions. [2021-11-19 15:45:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:45:31,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:31,179 INFO L514 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, 1] [2021-11-19 15:45:31,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:31,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 863262848, now seen corresponding path program 1 times [2021-11-19 15:45:31,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:31,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794881326] [2021-11-19 15:45:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:31,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:31,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:31,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:45:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:45:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:32,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:32,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:32,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794881326] [2021-11-19 15:45:32,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794881326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:32,755 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:32,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 15:45:32,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605495696] [2021-11-19 15:45:32,756 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:32,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:45:32,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:45:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:45:32,758 INFO L87 Difference]: Start difference. First operand 482 states and 789 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 15:45:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:35,957 INFO L93 Difference]: Finished difference Result 1056 states and 1781 transitions. [2021-11-19 15:45:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:45:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) Word has length 88 [2021-11-19 15:45:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:35,964 INFO L225 Difference]: With dead ends: 1056 [2021-11-19 15:45:35,964 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 15:45:35,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:45:35,971 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 1503 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:35,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 2543 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:45:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 15:45:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 486. [2021-11-19 15:45:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 379 states have (on average 1.6490765171503958) internal successors, (625), 398 states have internal predecessors, (625), 86 states have call successors, (86), 20 states have call predecessors, (86), 20 states have return successors, (97), 80 states have call predecessors, (97), 81 states have call successors, (97) [2021-11-19 15:45:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 808 transitions. [2021-11-19 15:45:36,018 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 808 transitions. Word has length 88 [2021-11-19 15:45:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:36,018 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 808 transitions. [2021-11-19 15:45:36,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 12 states have internal predecessors, (122), 6 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-19 15:45:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 808 transitions. [2021-11-19 15:45:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 15:45:36,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:36,022 INFO L514 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, 1, 1] [2021-11-19 15:45:36,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 15:45:36,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:36,241 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:36,241 INFO L85 PathProgramCache]: Analyzing trace with hash 659821929, now seen corresponding path program 1 times [2021-11-19 15:45:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:36,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536407185] [2021-11-19 15:45:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:36,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:36,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:45:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:45:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:36,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:37,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:37,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536407185] [2021-11-19 15:45:37,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536407185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:37,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:37,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:45:37,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769282492] [2021-11-19 15:45:37,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:37,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:45:37,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:45:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:37,225 INFO L87 Difference]: Start difference. First operand 486 states and 808 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 15:45:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:42,665 INFO L93 Difference]: Finished difference Result 1766 states and 3048 transitions. [2021-11-19 15:45:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 15:45:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 89 [2021-11-19 15:45:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:42,688 INFO L225 Difference]: With dead ends: 1766 [2021-11-19 15:45:42,688 INFO L226 Difference]: Without dead ends: 1325 [2021-11-19 15:45:42,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:45:42,694 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 3261 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 4570 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3334 SdHoareTripleChecker+Valid, 4005 SdHoareTripleChecker+Invalid, 5494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 4570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:42,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3334 Valid, 4005 Invalid, 5494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 4570 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 15:45:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-19 15:45:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1237. [2021-11-19 15:45:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 961 states have (on average 1.6649323621227887) internal successors, (1600), 1009 states have internal predecessors, (1600), 223 states have call successors, (223), 51 states have call predecessors, (223), 52 states have return successors, (241), 213 states have call predecessors, (241), 218 states have call successors, (241) [2021-11-19 15:45:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2064 transitions. [2021-11-19 15:45:42,805 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2064 transitions. Word has length 89 [2021-11-19 15:45:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:42,805 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 2064 transitions. [2021-11-19 15:45:42,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-19 15:45:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2064 transitions. [2021-11-19 15:45:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 15:45:42,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:42,809 INFO L514 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, 1, 1, 1, 1] [2021-11-19 15:45:42,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:43,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:43,026 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1914392595, now seen corresponding path program 1 times [2021-11-19 15:45:43,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:43,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700281921] [2021-11-19 15:45:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:43,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:43,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:43,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:45:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:43,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:45:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:43,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:44,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:44,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700281921] [2021-11-19 15:45:44,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700281921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:44,003 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:44,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 15:45:44,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338542015] [2021-11-19 15:45:44,003 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:44,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:45:44,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:45:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:44,005 INFO L87 Difference]: Start difference. First operand 1237 states and 2064 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 15:45:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:48,720 INFO L93 Difference]: Finished difference Result 3421 states and 5811 transitions. [2021-11-19 15:45:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 15:45:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 91 [2021-11-19 15:45:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:48,744 INFO L225 Difference]: With dead ends: 3421 [2021-11-19 15:45:48,744 INFO L226 Difference]: Without dead ends: 2531 [2021-11-19 15:45:48,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:45:48,752 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 3190 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 3933 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3261 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 4686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 3933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:48,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3261 Valid, 2926 Invalid, 4686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 3933 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 15:45:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-11-19 15:45:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2319. [2021-11-19 15:45:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 1804 states have (on average 1.667960088691796) internal successors, (3009), 1897 states have internal predecessors, (3009), 407 states have call successors, (407), 91 states have call predecessors, (407), 107 states have return successors, (498), 392 states have call predecessors, (498), 402 states have call successors, (498) [2021-11-19 15:45:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3914 transitions. [2021-11-19 15:45:48,919 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3914 transitions. Word has length 91 [2021-11-19 15:45:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 3914 transitions. [2021-11-19 15:45:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 15:45:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3914 transitions. [2021-11-19 15:45:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 15:45:48,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:48,924 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:48,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:49,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,141 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:49,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1246055183, now seen corresponding path program 1 times [2021-11-19 15:45:49,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:49,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804821613] [2021-11-19 15:45:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:49,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:49,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:49,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:45:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:45:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:50,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:50,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804821613] [2021-11-19 15:45:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804821613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:50,468 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:50,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 15:45:50,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821475383] [2021-11-19 15:45:50,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:50,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:45:50,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:45:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:45:50,470 INFO L87 Difference]: Start difference. First operand 2319 states and 3914 transitions. Second operand has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 15:45:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:56,457 INFO L93 Difference]: Finished difference Result 6288 states and 10673 transitions. [2021-11-19 15:45:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:45:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 96 [2021-11-19 15:45:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:56,502 INFO L225 Difference]: With dead ends: 6288 [2021-11-19 15:45:56,502 INFO L226 Difference]: Without dead ends: 4266 [2021-11-19 15:45:56,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 15:45:56,518 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 3705 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 4915 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 5891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 4915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:56,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3777 Valid, 2948 Invalid, 5891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 4915 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 15:45:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-11-19 15:45:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4104. [2021-11-19 15:45:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 3182 states have (on average 1.6580766813324952) internal successors, (5276), 3342 states have internal predecessors, (5276), 725 states have call successors, (725), 167 states have call predecessors, (725), 196 states have return successors, (899), 702 states have call predecessors, (899), 720 states have call successors, (899) [2021-11-19 15:45:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 6900 transitions. [2021-11-19 15:45:56,840 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 6900 transitions. Word has length 96 [2021-11-19 15:45:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 4104 states and 6900 transitions. [2021-11-19 15:45:56,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.857142857142858) internal successors, (124), 12 states have internal predecessors, (124), 7 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-19 15:45:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 6900 transitions. [2021-11-19 15:45:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 15:45:56,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:56,845 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:56,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:57,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:57,062 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1745206679, now seen corresponding path program 1 times [2021-11-19 15:45:57,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:57,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771963674] [2021-11-19 15:45:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:57,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:57,063 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:57,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:45:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:45:57,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:57,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:45:57,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771963674] [2021-11-19 15:45:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771963674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:57,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:57,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:45:57,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821345642] [2021-11-19 15:45:57,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:57,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:45:57,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:45:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:45:57,853 INFO L87 Difference]: Start difference. First operand 4104 states and 6900 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:45:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:58,191 INFO L93 Difference]: Finished difference Result 8177 states and 13900 transitions. [2021-11-19 15:45:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:45:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2021-11-19 15:45:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:58,230 INFO L225 Difference]: With dead ends: 8177 [2021-11-19 15:45:58,230 INFO L226 Difference]: Without dead ends: 4104 [2021-11-19 15:45:58,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:58,262 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 310 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2209 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:58,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 2209 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2021-11-19 15:45:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 4104. [2021-11-19 15:45:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 3182 states have (on average 1.6385920804525456) internal successors, (5214), 3342 states have internal predecessors, (5214), 725 states have call successors, (725), 167 states have call predecessors, (725), 196 states have return successors, (899), 702 states have call predecessors, (899), 720 states have call successors, (899) [2021-11-19 15:45:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 6838 transitions. [2021-11-19 15:45:58,589 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 6838 transitions. Word has length 103 [2021-11-19 15:45:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:58,590 INFO L470 AbstractCegarLoop]: Abstraction has 4104 states and 6838 transitions. [2021-11-19 15:45:58,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 15:45:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 6838 transitions. [2021-11-19 15:45:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 15:45:58,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:58,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:58,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:58,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:58,815 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:45:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1888746518, now seen corresponding path program 1 times [2021-11-19 15:45:58,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:58,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839213692] [2021-11-19 15:45:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:58,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:58,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:58,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:58,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:45:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:45:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:59,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 15:45:59,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:59,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839213692] [2021-11-19 15:45:59,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839213692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:59,888 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:59,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 15:45:59,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570196024] [2021-11-19 15:45:59,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:59,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:45:59,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:45:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:45:59,890 INFO L87 Difference]: Start difference. First operand 4104 states and 6838 transitions. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:46:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:03,253 INFO L93 Difference]: Finished difference Result 8266 states and 13819 transitions. [2021-11-19 15:46:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:46:03,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 108 [2021-11-19 15:46:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:03,284 INFO L225 Difference]: With dead ends: 8266 [2021-11-19 15:46:03,284 INFO L226 Difference]: Without dead ends: 4566 [2021-11-19 15:46:03,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:46:03,304 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 1966 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 2471 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:03,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 2471 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:46:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2021-11-19 15:46:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4284. [2021-11-19 15:46:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 3318 states have (on average 1.6262808921036769) internal successors, (5396), 3488 states have internal predecessors, (5396), 744 states have call successors, (744), 183 states have call predecessors, (744), 221 states have return successors, (942), 720 states have call predecessors, (942), 739 states have call successors, (942) [2021-11-19 15:46:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 7082 transitions. [2021-11-19 15:46:03,643 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 7082 transitions. Word has length 108 [2021-11-19 15:46:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:03,644 INFO L470 AbstractCegarLoop]: Abstraction has 4284 states and 7082 transitions. [2021-11-19 15:46:03,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 15:46:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 7082 transitions. [2021-11-19 15:46:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:46:03,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:03,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:03,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:03,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:03,864 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1006931789, now seen corresponding path program 1 times [2021-11-19 15:46:03,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:03,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233812571] [2021-11-19 15:46:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:03,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:03,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:03,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:46:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:46:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:46:04,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 15:46:05,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:05,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233812571] [2021-11-19 15:46:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233812571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:05,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:05,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:46:05,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995775277] [2021-11-19 15:46:05,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:05,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:46:05,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:46:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:46:05,262 INFO L87 Difference]: Start difference. First operand 4284 states and 7082 transitions. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 15:46:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:10,356 INFO L93 Difference]: Finished difference Result 11361 states and 18985 transitions. [2021-11-19 15:46:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 15:46:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) Word has length 113 [2021-11-19 15:46:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:10,409 INFO L225 Difference]: With dead ends: 11361 [2021-11-19 15:46:10,409 INFO L226 Difference]: Without dead ends: 7479 [2021-11-19 15:46:10,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 15:46:10,428 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 3054 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3123 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:10,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3123 Valid, 2804 Invalid, 5485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [833 Valid, 4652 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 15:46:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2021-11-19 15:46:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7427. [2021-11-19 15:46:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7427 states, 5759 states have (on average 1.6396943913873936) internal successors, (9443), 6032 states have internal predecessors, (9443), 1311 states have call successors, (1311), 329 states have call predecessors, (1311), 356 states have return successors, (1591), 1269 states have call predecessors, (1591), 1306 states have call successors, (1591) [2021-11-19 15:46:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7427 states to 7427 states and 12345 transitions. [2021-11-19 15:46:10,939 INFO L78 Accepts]: Start accepts. Automaton has 7427 states and 12345 transitions. Word has length 113 [2021-11-19 15:46:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:10,939 INFO L470 AbstractCegarLoop]: Abstraction has 7427 states and 12345 transitions. [2021-11-19 15:46:10,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 11 states have internal predecessors, (139), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 9 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 15:46:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7427 states and 12345 transitions. [2021-11-19 15:46:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:46:10,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:10,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:10,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:11,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:11,161 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash 872918283, now seen corresponding path program 1 times [2021-11-19 15:46:11,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:11,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951161228] [2021-11-19 15:46:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:11,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:11,163 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:11,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:46:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:46:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:11,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:12,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:12,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951161228] [2021-11-19 15:46:12,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951161228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:12,444 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:12,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:46:12,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773007457] [2021-11-19 15:46:12,444 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:12,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:46:12,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:46:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:46:12,445 INFO L87 Difference]: Start difference. First operand 7427 states and 12345 transitions. Second operand has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 15:46:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:18,038 INFO L93 Difference]: Finished difference Result 18828 states and 31732 transitions. [2021-11-19 15:46:18,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:46:18,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) Word has length 113 [2021-11-19 15:46:18,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:18,170 INFO L225 Difference]: With dead ends: 18828 [2021-11-19 15:46:18,171 INFO L226 Difference]: Without dead ends: 11051 [2021-11-19 15:46:18,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:46:18,207 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 4138 mSDsluCounter, 2338 mSDsCounter, 0 mSdLazyCounter, 5294 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4230 SdHoareTripleChecker+Valid, 3263 SdHoareTripleChecker+Invalid, 6468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 5294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:18,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4230 Valid, 3263 Invalid, 6468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 5294 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 15:46:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2021-11-19 15:46:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 10632. [2021-11-19 15:46:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 8218 states have (on average 1.6333657824288148) internal successors, (13423), 8634 states have internal predecessors, (13423), 1901 states have call successors, (1901), 489 states have call predecessors, (1901), 512 states have return successors, (2346), 1808 states have call predecessors, (2346), 1896 states have call successors, (2346) [2021-11-19 15:46:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 17670 transitions. [2021-11-19 15:46:18,902 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 17670 transitions. Word has length 113 [2021-11-19 15:46:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:18,902 INFO L470 AbstractCegarLoop]: Abstraction has 10632 states and 17670 transitions. [2021-11-19 15:46:18,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 5 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (20), 9 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-19 15:46:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 17670 transitions. [2021-11-19 15:46:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 15:46:18,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:18,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:18,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-19 15:46:19,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:19,120 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2005795480, now seen corresponding path program 1 times [2021-11-19 15:46:19,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:19,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14354816] [2021-11-19 15:46:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:19,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:19,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:19,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:46:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:46:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:19,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:20,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:20,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14354816] [2021-11-19 15:46:20,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14354816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:20,135 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:20,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-19 15:46:20,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405862403] [2021-11-19 15:46:20,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:20,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:46:20,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:46:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:46:20,137 INFO L87 Difference]: Start difference. First operand 10632 states and 17670 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 15:46:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:21,552 INFO L93 Difference]: Finished difference Result 10889 states and 18147 transitions. [2021-11-19 15:46:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) Word has length 114 [2021-11-19 15:46:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:21,619 INFO L225 Difference]: With dead ends: 10889 [2021-11-19 15:46:21,619 INFO L226 Difference]: Without dead ends: 10874 [2021-11-19 15:46:21,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:46:21,627 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 962 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:21,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 2591 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:46:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10874 states. [2021-11-19 15:46:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10874 to 10714. [2021-11-19 15:46:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10714 states, 8286 states have (on average 1.6310644460535844) internal successors, (13515), 8699 states have internal predecessors, (13515), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-19 15:46:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10714 states to 10714 states and 17800 transitions. [2021-11-19 15:46:22,304 INFO L78 Accepts]: Start accepts. Automaton has 10714 states and 17800 transitions. Word has length 114 [2021-11-19 15:46:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:22,305 INFO L470 AbstractCegarLoop]: Abstraction has 10714 states and 17800 transitions. [2021-11-19 15:46:22,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-19 15:46:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10714 states and 17800 transitions. [2021-11-19 15:46:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:46:22,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:22,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:22,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:22,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:22,524 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:22,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1886235315, now seen corresponding path program 1 times [2021-11-19 15:46:22,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:22,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507880895] [2021-11-19 15:46:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:22,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:22,526 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:22,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:46:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:23,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:23,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:23,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507880895] [2021-11-19 15:46:23,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507880895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:23,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:23,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:46:23,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743247783] [2021-11-19 15:46:23,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:23,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:46:23,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:46:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:46:23,416 INFO L87 Difference]: Start difference. First operand 10714 states and 17800 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:46:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:23,897 INFO L93 Difference]: Finished difference Result 10729 states and 17818 transitions. [2021-11-19 15:46:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) Word has length 120 [2021-11-19 15:46:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:23,979 INFO L225 Difference]: With dead ends: 10729 [2021-11-19 15:46:23,979 INFO L226 Difference]: Without dead ends: 10714 [2021-11-19 15:46:24,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:46:24,090 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 37 mSDsluCounter, 4590 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 5371 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 5371 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:46:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10714 states. [2021-11-19 15:46:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10714 to 10714. [2021-11-19 15:46:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10714 states, 8286 states have (on average 1.6288921071687184) internal successors, (13497), 8699 states have internal predecessors, (13497), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-19 15:46:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10714 states to 10714 states and 17782 transitions. [2021-11-19 15:46:24,727 INFO L78 Accepts]: Start accepts. Automaton has 10714 states and 17782 transitions. Word has length 120 [2021-11-19 15:46:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:24,728 INFO L470 AbstractCegarLoop]: Abstraction has 10714 states and 17782 transitions. [2021-11-19 15:46:24,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 4 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 15:46:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10714 states and 17782 transitions. [2021-11-19 15:46:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 15:46:24,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:24,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:24,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:24,948 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -742193045, now seen corresponding path program 1 times [2021-11-19 15:46:24,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:24,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543094840] [2021-11-19 15:46:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:24,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:24,951 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:24,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:46:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:46:25,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:46:25,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:46:26,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543094840] [2021-11-19 15:46:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543094840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:26,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:26,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 15:46:26,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957001047] [2021-11-19 15:46:26,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:46:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:46:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:46:26,281 INFO L87 Difference]: Start difference. First operand 10714 states and 17782 transitions. Second operand has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:46:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:28,570 INFO L93 Difference]: Finished difference Result 21365 states and 35525 transitions. [2021-11-19 15:46:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) Word has length 131 [2021-11-19 15:46:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:28,657 INFO L225 Difference]: With dead ends: 21365 [2021-11-19 15:46:28,657 INFO L226 Difference]: Without dead ends: 10752 [2021-11-19 15:46:28,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:46:28,705 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1165 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:28,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1927 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:46:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2021-11-19 15:46:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 10714. [2021-11-19 15:46:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10714 states, 8286 states have (on average 1.6267197682838523) internal successors, (13479), 8699 states have internal predecessors, (13479), 1915 states have call successors, (1915), 489 states have call predecessors, (1915), 512 states have return successors, (2370), 1825 states have call predecessors, (2370), 1910 states have call successors, (2370) [2021-11-19 15:46:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10714 states to 10714 states and 17764 transitions. [2021-11-19 15:46:29,421 INFO L78 Accepts]: Start accepts. Automaton has 10714 states and 17764 transitions. Word has length 131 [2021-11-19 15:46:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:29,421 INFO L470 AbstractCegarLoop]: Abstraction has 10714 states and 17764 transitions. [2021-11-19 15:46:29,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.76923076923077) internal successors, (153), 11 states have internal predecessors, (153), 5 states have call successors, (24), 4 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:46:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10714 states and 17764 transitions. [2021-11-19 15:46:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 15:46:29,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:29,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:29,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:29,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:29,624 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1433321322, now seen corresponding path program 1 times [2021-11-19 15:46:29,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:29,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491886970] [2021-11-19 15:46:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:29,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:29,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:29,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:29,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:46:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:46:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:46:30,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:46:30,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:30,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491886970] [2021-11-19 15:46:30,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491886970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:30,652 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:30,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 15:46:30,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829093937] [2021-11-19 15:46:30,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:30,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:46:30,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:46:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:46:30,654 INFO L87 Difference]: Start difference. First operand 10714 states and 17764 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:46:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:34,465 INFO L93 Difference]: Finished difference Result 36551 states and 61678 transitions. [2021-11-19 15:46:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 132 [2021-11-19 15:46:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:34,628 INFO L225 Difference]: With dead ends: 36551 [2021-11-19 15:46:34,629 INFO L226 Difference]: Without dead ends: 25938 [2021-11-19 15:46:34,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:46:34,682 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 1915 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2009 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:34,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2009 Valid, 2180 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 15:46:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25938 states. [2021-11-19 15:46:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25938 to 25173. [2021-11-19 15:46:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25173 states, 19092 states have (on average 1.6175361407919548) internal successors, (30882), 20184 states have internal predecessors, (30882), 4918 states have call successors, (4918), 1043 states have call predecessors, (4918), 1162 states have return successors, (6532), 4670 states have call predecessors, (6532), 4913 states have call successors, (6532) [2021-11-19 15:46:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25173 states to 25173 states and 42332 transitions. [2021-11-19 15:46:36,700 INFO L78 Accepts]: Start accepts. Automaton has 25173 states and 42332 transitions. Word has length 132 [2021-11-19 15:46:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 25173 states and 42332 transitions. [2021-11-19 15:46:36,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 5 states have call successors, (24), 5 states have call predecessors, (24), 6 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 15:46:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25173 states and 42332 transitions. [2021-11-19 15:46:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 15:46:36,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:36,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:36,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 15:46:36,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:36,925 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash -62426954, now seen corresponding path program 1 times [2021-11-19 15:46:36,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:36,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182261192] [2021-11-19 15:46:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:36,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:36,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:36,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:46:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:37,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:46:37,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 15:46:37,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:37,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182261192] [2021-11-19 15:46:37,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182261192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:37,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:37,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-19 15:46:37,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659516104] [2021-11-19 15:46:37,734 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:37,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:37,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:37,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:37,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:46:37,737 INFO L87 Difference]: Start difference. First operand 25173 states and 42332 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 15:46:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:39,350 INFO L93 Difference]: Finished difference Result 25548 states and 42983 transitions. [2021-11-19 15:46:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 140 [2021-11-19 15:46:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:39,516 INFO L225 Difference]: With dead ends: 25548 [2021-11-19 15:46:39,516 INFO L226 Difference]: Without dead ends: 25533 [2021-11-19 15:46:39,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:46:39,539 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 77 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:39,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 3207 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:46:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25533 states. [2021-11-19 15:46:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25533 to 25227. [2021-11-19 15:46:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25227 states, 19146 states have (on average 1.6149065078867648) internal successors, (30919), 20238 states have internal predecessors, (30919), 4918 states have call successors, (4918), 1043 states have call predecessors, (4918), 1162 states have return successors, (6532), 4670 states have call predecessors, (6532), 4913 states have call successors, (6532) [2021-11-19 15:46:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25227 states to 25227 states and 42369 transitions. [2021-11-19 15:46:41,454 INFO L78 Accepts]: Start accepts. Automaton has 25227 states and 42369 transitions. Word has length 140 [2021-11-19 15:46:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:41,454 INFO L470 AbstractCegarLoop]: Abstraction has 25227 states and 42369 transitions. [2021-11-19 15:46:41,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 15:46:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 25227 states and 42369 transitions. [2021-11-19 15:46:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 15:46:41,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:41,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:41,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 15:46:41,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:41,661 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -415089072, now seen corresponding path program 1 times [2021-11-19 15:46:41,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:41,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882163696] [2021-11-19 15:46:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:41,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:41,664 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:41,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:46:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:46:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:46:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 15:46:42,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:42,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882163696] [2021-11-19 15:46:42,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882163696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:42,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038978713] [2021-11-19 15:46:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:42,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:42,980 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:42,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:46:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:46:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:46:43,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:46:44,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038978713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:44,196 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:46:44,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 8] total 18 [2021-11-19 15:46:44,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115480992] [2021-11-19 15:46:44,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:44,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:46:44,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:46:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:46:44,200 INFO L87 Difference]: Start difference. First operand 25227 states and 42369 transitions. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 15:46:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:49,475 INFO L93 Difference]: Finished difference Result 85692 states and 148940 transitions. [2021-11-19 15:46:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:46:49,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) Word has length 168 [2021-11-19 15:46:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:50,079 INFO L225 Difference]: With dead ends: 85692 [2021-11-19 15:46:50,079 INFO L226 Difference]: Without dead ends: 60553 [2021-11-19 15:46:50,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:46:50,178 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 2753 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2823 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:50,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2823 Valid, 1244 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:46:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60553 states. [2021-11-19 15:46:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60553 to 56845. [2021-11-19 15:46:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56845 states, 42152 states have (on average 1.608393433289049) internal successors, (67797), 44899 states have internal predecessors, (67797), 12218 states have call successors, (12218), 2069 states have call predecessors, (12218), 2474 states have return successors, (18935), 11701 states have call predecessors, (18935), 12213 states have call successors, (18935) [2021-11-19 15:46:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56845 states to 56845 states and 98950 transitions. [2021-11-19 15:46:54,232 INFO L78 Accepts]: Start accepts. Automaton has 56845 states and 98950 transitions. Word has length 168 [2021-11-19 15:46:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:54,233 INFO L470 AbstractCegarLoop]: Abstraction has 56845 states and 98950 transitions. [2021-11-19 15:46:54,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 5 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 15:46:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 56845 states and 98950 transitions. [2021-11-19 15:46:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 15:46:54,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:54,245 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:54,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:54,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:54,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:54,650 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:46:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 16724060, now seen corresponding path program 1 times [2021-11-19 15:46:54,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:54,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901189654] [2021-11-19 15:46:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:54,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:54,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:54,653 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:54,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:46:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:54,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:46:54,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:46:55,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-19 15:46:56,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:56,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901189654] [2021-11-19 15:46:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901189654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:56,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1370065566] [2021-11-19 15:46:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:56,253 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:56,260 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:56,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7cb26dc-3e9b-4aca-bd3c-e651188f4041/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 15:46:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:46:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 15:46:56,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-19 15:46:57,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1370065566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:57,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:46:57,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 8] total 16 [2021-11-19 15:46:57,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877987190] [2021-11-19 15:46:57,198 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:57,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:46:57,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:46:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:46:57,199 INFO L87 Difference]: Start difference. First operand 56845 states and 98950 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 15:47:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:04,792 INFO L93 Difference]: Finished difference Result 169519 states and 300322 transitions. [2021-11-19 15:47:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:47:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 169 [2021-11-19 15:47:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:05,751 INFO L225 Difference]: With dead ends: 169519 [2021-11-19 15:47:05,751 INFO L226 Difference]: Without dead ends: 112719 [2021-11-19 15:47:06,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:47:06,274 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 712 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:06,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1625 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:47:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112719 states.