./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.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_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/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_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/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_f73525c4-f73e-4469-92e7-5978e37dd921/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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:29:06,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:29:06,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:29:06,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:29:06,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:29:06,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:29:06,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:29:06,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:29:06,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:29:06,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:29:06,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:29:06,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:29:06,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:29:06,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:29:06,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:29:06,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:29:06,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:29:06,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:29:06,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:29:06,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:29:06,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:29:06,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:29:06,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:29:06,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:29:06,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:29:06,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:29:06,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:29:06,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:29:06,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:29:06,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:29:06,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:29:06,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:29:06,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:29:06,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:29:06,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:29:06,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:29:06,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:29:06,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:29:06,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:29:06,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:29:06,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:29:06,595 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:29:06,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:29:06,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:29:06,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:29:06,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:29:06,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:29:06,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:29:06,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:29:06,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:29:06,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:29:06,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:29:06,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:29:06,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:29:06,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:29:06,628 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:29:06,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:29:06,628 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:29:06,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:29:06,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:29:06,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:29:06,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:29:06,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:29:06,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:29:06,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:29:06,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:29:06,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:29:06,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:29:06,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:29:06,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:29:06,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:29:06,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:29:06,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:29:06,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:06,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:29:06,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:29:06,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:29:06,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:29:06,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:29:06,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:29:06,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:29:06,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:29:06,633 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_f73525c4-f73e-4469-92e7-5978e37dd921/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-19 13:29:06,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:29:06,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:29:06,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:29:06,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:29:06,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:29:06,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-19 13:29:07,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/a15543fc2/8d9bd0ed40ed490f8c59458a7cfcd1f2/FLAG6c03e679e [2021-11-19 13:29:07,646 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:29:07,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-19 13:29:07,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/a15543fc2/8d9bd0ed40ed490f8c59458a7cfcd1f2/FLAG6c03e679e [2021-11-19 13:29:07,849 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/a15543fc2/8d9bd0ed40ed490f8c59458a7cfcd1f2 [2021-11-19 13:29:07,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:29:07,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:29:07,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:07,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:29:07,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:29:07,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:07" (1/1) ... [2021-11-19 13:29:07,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3688bbae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:07, skipping insertion in model container [2021-11-19 13:29:07,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:07" (1/1) ... [2021-11-19 13:29:07,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:29:07,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:29:08,346 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_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-19 13:29:08,529 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:29:08,540 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 13:29:08,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@328bd29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:08, skipping insertion in model container [2021-11-19 13:29:08,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:08,541 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:29:08,543 INFO L158 Benchmark]: Toolchain (without parser) took 689.07ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 55.9MB in the beginning and 79.8MB in the end (delta: -23.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 13:29:08,544 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:29:08,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 686.43ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 55.8MB in the beginning and 79.8MB in the end (delta: -24.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 13:29:08,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 32.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 686.43ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 55.8MB in the beginning and 79.8MB in the end (delta: -24.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/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_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/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_f73525c4-f73e-4469-92e7-5978e37dd921/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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:29:10,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:29:10,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:29:10,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:29:10,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:29:10,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:29:10,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:29:10,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:29:10,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:29:10,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:29:10,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:29:10,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:29:10,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:29:10,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:29:10,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:29:10,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:29:10,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:29:10,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:29:10,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:29:10,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:29:10,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:29:10,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:29:10,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:29:10,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:29:10,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:29:10,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:29:10,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:29:10,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:29:10,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:29:10,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:29:10,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:29:10,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:29:10,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:29:10,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:29:10,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:29:10,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:29:10,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:29:10,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:29:10,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:29:10,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:29:10,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:29:10,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:29:10,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:29:10,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:29:10,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:29:10,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:29:10,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:29:10,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:29:10,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:29:10,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:29:10,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:29:10,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:29:10,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:29:10,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:29:10,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:29:10,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:29:10,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:29:10,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:29:10,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:29:10,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:29:10,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:29:10,947 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:29:10,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:29:10,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:29:10,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:29:10,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:29:10,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:29:10,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:29:10,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:29:10,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:10,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:29:10,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:29:10,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:29:10,951 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:29:10,951 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:29:10,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:29:10,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:29:10,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:29:10,952 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_f73525c4-f73e-4469-92e7-5978e37dd921/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2021-11-19 13:29:11,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:29:11,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:29:11,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:29:11,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:29:11,368 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:29:11,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-19 13:29:11,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/b41c76ccd/74e81d1f5e8147808ded128de4572150/FLAGa197541c9 [2021-11-19 13:29:12,207 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:29:12,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2021-11-19 13:29:12,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/b41c76ccd/74e81d1f5e8147808ded128de4572150/FLAGa197541c9 [2021-11-19 13:29:12,379 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/data/b41c76ccd/74e81d1f5e8147808ded128de4572150 [2021-11-19 13:29:12,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:29:12,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:29:12,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:12,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:29:12,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:29:12,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:12" (1/1) ... [2021-11-19 13:29:12,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa0a5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:12, skipping insertion in model container [2021-11-19 13:29:12,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:29:12" (1/1) ... [2021-11-19 13:29:12,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:29:12,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:29:12,989 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_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-19 13:29:13,084 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:29:13,097 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:29:13,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:29:13,211 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_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-19 13:29:13,246 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:29:13,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:29:13,329 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_f73525c4-f73e-4469-92e7-5978e37dd921/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2021-11-19 13:29:13,380 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:29:13,418 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:29:13,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13 WrapperNode [2021-11-19 13:29:13,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:29:13,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:29:13,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:29:13,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:29:13,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,539 INFO L137 Inliner]: procedures = 95, calls = 339, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1059 [2021-11-19 13:29:13,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:29:13,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:29:13,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:29:13,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:29:13,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:29:13,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:29:13,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:29:13,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:29:13,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (1/1) ... [2021-11-19 13:29:13,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:29:13,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:29:13,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:29:13,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:29:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:29:13,739 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:29:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:29:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:29:13,741 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:29:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:29:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:29:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:29:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:29:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:29:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:29:13,766 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:29:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:29:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:29:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:29:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:29:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:29:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:29:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:29:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:29:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:29:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:29:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:29:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:29:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:29:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:29:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:29:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:29:13,769 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 13:29:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:29:13,769 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:29:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:29:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:29:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:29:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:29:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:29:13,770 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:29:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:29:13,771 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:29:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:29:13,771 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:29:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:29:13,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:29:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:29:13,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:29:13,774 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:29:13,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:29:14,006 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:29:14,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:29:15,227 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:29:15,244 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:29:15,244 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:29:15,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:29:15 BoogieIcfgContainer [2021-11-19 13:29:15,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:29:15,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:29:15,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:29:15,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:29:15,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:29:12" (1/3) ... [2021-11-19 13:29:15,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3c70ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:29:15, skipping insertion in model container [2021-11-19 13:29:15,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:29:13" (2/3) ... [2021-11-19 13:29:15,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3c70ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:29:15, skipping insertion in model container [2021-11-19 13:29:15,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:29:15" (3/3) ... [2021-11-19 13:29:15,257 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2021-11-19 13:29:15,278 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:29:15,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:29:15,332 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:29:15,345 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 13:29:15,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:29:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 561 states, 438 states have (on average 1.6917808219178083) internal successors, (741), 459 states have internal predecessors, (741), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:29:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:29:15,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:15,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:15,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 962722650, now seen corresponding path program 1 times [2021-11-19 13:29:15,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:15,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885806836] [2021-11-19 13:29:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:15,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:15,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:15,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:15,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:29:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:29:16,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:29:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:29:16,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:16,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885806836] [2021-11-19 13:29:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885806836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:16,837 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:16,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:29:16,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355940989] [2021-11-19 13:29:16,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:16,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:29:16,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:29:16,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:29:16,876 INFO L87 Difference]: Start difference. First operand has 561 states, 438 states have (on average 1.6917808219178083) internal successors, (741), 459 states have internal predecessors, (741), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 13:29:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:16,965 INFO L93 Difference]: Finished difference Result 582 states and 965 transitions. [2021-11-19 13:29:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:29:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-19 13:29:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:17,002 INFO L225 Difference]: With dead ends: 582 [2021-11-19 13:29:17,002 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 13:29:17,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 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 13:29:17,010 INFO L933 BasicCegarLoop]: 926 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, 926 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 13:29:17,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 13:29:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 13:29:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6898148148148149) internal successors, (730), 451 states have internal predecessors, (730), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 919 transitions. [2021-11-19 13:29:17,137 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 919 transitions. Word has length 125 [2021-11-19 13:29:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:17,139 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 919 transitions. [2021-11-19 13:29:17,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 13:29:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 919 transitions. [2021-11-19 13:29:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:29:17,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:17,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:17,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:17,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:17,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 612259598, now seen corresponding path program 1 times [2021-11-19 13:29:17,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:17,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267076269] [2021-11-19 13:29:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:17,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:17,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:29:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:18,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:18,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267076269] [2021-11-19 13:29:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267076269] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:18,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:18,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023154302] [2021-11-19 13:29:18,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:18,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:18,467 INFO L87 Difference]: Start difference. First operand 553 states and 919 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:18,596 INFO L93 Difference]: Finished difference Result 1097 states and 1830 transitions. [2021-11-19 13:29:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:18,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-19 13:29:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:18,608 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 13:29:18,609 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 13:29:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 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 13:29:18,619 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 14 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:18,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2708 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 13:29:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 13:29:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6875) internal successors, (729), 451 states have internal predecessors, (729), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 918 transitions. [2021-11-19 13:29:18,688 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 918 transitions. Word has length 127 [2021-11-19 13:29:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 918 transitions. [2021-11-19 13:29:18,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 918 transitions. [2021-11-19 13:29:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:29:18,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:18,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:18,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:18,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:18,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1908031680, now seen corresponding path program 1 times [2021-11-19 13:29:18,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:18,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087262539] [2021-11-19 13:29:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:18,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:18,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:18,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:29:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:19,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:20,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:20,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087262539] [2021-11-19 13:29:20,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087262539] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:20,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:20,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:20,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474248400] [2021-11-19 13:29:20,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:20,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:20,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:20,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:20,024 INFO L87 Difference]: Start difference. First operand 553 states and 918 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:20,107 INFO L93 Difference]: Finished difference Result 1097 states and 1828 transitions. [2021-11-19 13:29:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-19 13:29:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:20,116 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 13:29:20,116 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 13:29:20,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 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 13:29:20,123 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 12 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:20,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2708 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 13:29:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 13:29:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 432 states have (on average 1.6851851851851851) internal successors, (728), 451 states have internal predecessors, (728), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 917 transitions. [2021-11-19 13:29:20,169 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 917 transitions. Word has length 129 [2021-11-19 13:29:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:20,170 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 917 transitions. [2021-11-19 13:29:20,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 917 transitions. [2021-11-19 13:29:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:29:20,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:20,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:20,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:20,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:20,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:20,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1032252274, now seen corresponding path program 1 times [2021-11-19 13:29:20,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:20,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044566357] [2021-11-19 13:29:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:20,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:20,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:29:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:21,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:21,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044566357] [2021-11-19 13:29:21,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044566357] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:21,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:21,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:21,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933510604] [2021-11-19 13:29:21,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:21,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:21,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:21,397 INFO L87 Difference]: Start difference. First operand 553 states and 917 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:21,474 INFO L93 Difference]: Finished difference Result 1101 states and 1831 transitions. [2021-11-19 13:29:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-19 13:29:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:21,481 INFO L225 Difference]: With dead ends: 1101 [2021-11-19 13:29:21,481 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:21,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 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 13:29:21,490 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 13 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:21,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2708 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.677345537757437) internal successors, (733), 456 states have internal predecessors, (733), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 922 transitions. [2021-11-19 13:29:21,536 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 922 transitions. Word has length 131 [2021-11-19 13:29:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:21,537 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 922 transitions. [2021-11-19 13:29:21,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 922 transitions. [2021-11-19 13:29:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:29:21,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:21,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:21,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:21,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:21,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1063424087, now seen corresponding path program 1 times [2021-11-19 13:29:21,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:21,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322213071] [2021-11-19 13:29:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:21,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:21,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:21,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:29:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:22,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:22,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:22,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:22,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322213071] [2021-11-19 13:29:22,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322213071] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:22,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:22,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:22,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149471579] [2021-11-19 13:29:22,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:22,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:22,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:22,754 INFO L87 Difference]: Start difference. First operand 559 states and 922 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:22,831 INFO L93 Difference]: Finished difference Result 1100 states and 1822 transitions. [2021-11-19 13:29:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:22,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-19 13:29:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:22,838 INFO L225 Difference]: With dead ends: 1100 [2021-11-19 13:29:22,838 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:22,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 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 13:29:22,842 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 8 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:22,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2709 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.6750572082379862) internal successors, (732), 456 states have internal predecessors, (732), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 921 transitions. [2021-11-19 13:29:22,871 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 921 transitions. Word has length 132 [2021-11-19 13:29:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 921 transitions. [2021-11-19 13:29:22,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 921 transitions. [2021-11-19 13:29:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:29:22,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:22,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:22,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:23,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1178788366, now seen corresponding path program 1 times [2021-11-19 13:29:23,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:23,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654357917] [2021-11-19 13:29:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:23,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:23,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:29:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:23,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:24,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:24,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654357917] [2021-11-19 13:29:24,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654357917] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:24,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:24,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:24,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963074112] [2021-11-19 13:29:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:24,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:24,175 INFO L87 Difference]: Start difference. First operand 559 states and 921 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:24,247 INFO L93 Difference]: Finished difference Result 1100 states and 1821 transitions. [2021-11-19 13:29:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-19 13:29:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:24,255 INFO L225 Difference]: With dead ends: 1100 [2021-11-19 13:29:24,255 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:29:24,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 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 13:29:24,261 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 6 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:24,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2709 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:29:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:29:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 437 states have (on average 1.6727688787185355) internal successors, (731), 456 states have internal predecessors, (731), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 920 transitions. [2021-11-19 13:29:24,288 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 920 transitions. Word has length 133 [2021-11-19 13:29:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:24,288 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 920 transitions. [2021-11-19 13:29:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 920 transitions. [2021-11-19 13:29:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:29:24,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:24,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:24,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:24,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:24,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 390848205, now seen corresponding path program 1 times [2021-11-19 13:29:24,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:24,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167487773] [2021-11-19 13:29:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:24,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:24,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:24,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:29:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:24,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:25,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167487773] [2021-11-19 13:29:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167487773] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:25,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:25,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:29:25,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671953461] [2021-11-19 13:29:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:25,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:25,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:25,610 INFO L87 Difference]: Start difference. First operand 559 states and 920 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:25,815 INFO L93 Difference]: Finished difference Result 1117 states and 1849 transitions. [2021-11-19 13:29:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-19 13:29:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:25,823 INFO L225 Difference]: With dead ends: 1117 [2021-11-19 13:29:25,823 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 13:29:25,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 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 13:29:25,827 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 148 mSDsluCounter, 4413 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5317 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:25,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5317 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 13:29:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2021-11-19 13:29:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 453 states have (on average 1.6710816777041944) internal successors, (757), 474 states have internal predecessors, (757), 98 states have call successors, (98), 25 states have call predecessors, (98), 26 states have return successors, (96), 91 states have call predecessors, (96), 93 states have call successors, (96) [2021-11-19 13:29:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 951 transitions. [2021-11-19 13:29:25,855 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 951 transitions. Word has length 134 [2021-11-19 13:29:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 951 transitions. [2021-11-19 13:29:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 951 transitions. [2021-11-19 13:29:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:29:25,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:25,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:25,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:26,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:26,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1677330510, now seen corresponding path program 1 times [2021-11-19 13:29:26,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:26,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095340894] [2021-11-19 13:29:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:26,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:26,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:26,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:29:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:29:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:29:27,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:27,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095340894] [2021-11-19 13:29:27,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095340894] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:27,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:29:27,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007479902] [2021-11-19 13:29:27,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:27,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:29:27,108 INFO L87 Difference]: Start difference. First operand 578 states and 951 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:27,188 INFO L93 Difference]: Finished difference Result 1130 states and 1871 transitions. [2021-11-19 13:29:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-19 13:29:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:27,197 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 13:29:27,198 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 13:29:27,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:27,203 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 8 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:27,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2708 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:29:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 13:29:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 13:29:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.671840354767184) internal successors, (754), 471 states have internal predecessors, (754), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:29:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 944 transitions. [2021-11-19 13:29:27,235 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 944 transitions. Word has length 134 [2021-11-19 13:29:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 944 transitions. [2021-11-19 13:29:27,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 944 transitions. [2021-11-19 13:29:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:29:27,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:27,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:27,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:27,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:27,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1255246149, now seen corresponding path program 1 times [2021-11-19 13:29:27,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:27,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40422334] [2021-11-19 13:29:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:27,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:27,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:27,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:29:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:28,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:28,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:28,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40422334] [2021-11-19 13:29:28,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40422334] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:28,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:28,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:28,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749975103] [2021-11-19 13:29:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:28,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:28,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:28,436 INFO L87 Difference]: Start difference. First operand 574 states and 944 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:28,616 INFO L93 Difference]: Finished difference Result 1156 states and 1916 transitions. [2021-11-19 13:29:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-19 13:29:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:28,623 INFO L225 Difference]: With dead ends: 1156 [2021-11-19 13:29:28,623 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 13:29:28,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 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 13:29:28,627 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 134 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:28,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2516 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 13:29:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 13:29:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.6607538802660753) internal successors, (749), 471 states have internal predecessors, (749), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:29:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 939 transitions. [2021-11-19 13:29:28,653 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 939 transitions. Word has length 135 [2021-11-19 13:29:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:28,653 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 939 transitions. [2021-11-19 13:29:28,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 939 transitions. [2021-11-19 13:29:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:29:28,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:28,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:28,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:28,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:28,880 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash 277041591, now seen corresponding path program 1 times [2021-11-19 13:29:28,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:28,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252129341] [2021-11-19 13:29:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:28,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:28,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:28,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:29:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:29,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:29,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:29,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252129341] [2021-11-19 13:29:29,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252129341] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:29,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949248470] [2021-11-19 13:29:29,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:29,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:29,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:29,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:29,920 INFO L87 Difference]: Start difference. First operand 574 states and 939 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:30,088 INFO L93 Difference]: Finished difference Result 1156 states and 1906 transitions. [2021-11-19 13:29:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-19 13:29:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:30,095 INFO L225 Difference]: With dead ends: 1156 [2021-11-19 13:29:30,095 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 13:29:30,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 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 13:29:30,099 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 128 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2516 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:30,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2516 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 13:29:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 13:29:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 451 states have (on average 1.6496674057649667) internal successors, (744), 471 states have internal predecessors, (744), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:29:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 934 transitions. [2021-11-19 13:29:30,125 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 934 transitions. Word has length 137 [2021-11-19 13:29:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:30,125 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 934 transitions. [2021-11-19 13:29:30,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 934 transitions. [2021-11-19 13:29:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:29:30,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:30,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:30,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:30,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1018798693, now seen corresponding path program 1 times [2021-11-19 13:29:30,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:30,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802597699] [2021-11-19 13:29:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:30,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:30,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:30,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:29:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:30,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:31,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:31,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802597699] [2021-11-19 13:29:31,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802597699] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:31,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:31,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:31,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900963007] [2021-11-19 13:29:31,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:31,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:31,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:31,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:31,368 INFO L87 Difference]: Start difference. First operand 574 states and 934 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:31,549 INFO L93 Difference]: Finished difference Result 1177 states and 1927 transitions. [2021-11-19 13:29:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:29:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-19 13:29:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:31,556 INFO L225 Difference]: With dead ends: 1177 [2021-11-19 13:29:31,556 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 13:29:31,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 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 13:29:31,564 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 143 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:31,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2526 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 13:29:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2021-11-19 13:29:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 466 states have (on average 1.628755364806867) internal successors, (759), 485 states have internal predecessors, (759), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 948 transitions. [2021-11-19 13:29:31,594 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 948 transitions. Word has length 139 [2021-11-19 13:29:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:31,596 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 948 transitions. [2021-11-19 13:29:31,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 948 transitions. [2021-11-19 13:29:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:29:31,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:31,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:31,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:31,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:31,816 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 916705563, now seen corresponding path program 1 times [2021-11-19 13:29:31,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:31,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371884562] [2021-11-19 13:29:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:31,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:31,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:31,818 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:31,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:29:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:32,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:32,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:32,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:32,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371884562] [2021-11-19 13:29:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371884562] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:32,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:29:32,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051590345] [2021-11-19 13:29:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:32,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:29:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:29:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:29:32,791 INFO L87 Difference]: Start difference. First operand 589 states and 948 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:32,975 INFO L93 Difference]: Finished difference Result 1141 states and 1848 transitions. [2021-11-19 13:29:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:32,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-19 13:29:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:32,981 INFO L225 Difference]: With dead ends: 1141 [2021-11-19 13:29:32,981 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 13:29:32,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 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 13:29:32,985 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 131 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5285 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:32,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5285 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 13:29:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 568. [2021-11-19 13:29:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6224719101123595) internal successors, (722), 464 states have internal predecessors, (722), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 911 transitions. [2021-11-19 13:29:33,010 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 911 transitions. Word has length 139 [2021-11-19 13:29:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 911 transitions. [2021-11-19 13:29:33,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 911 transitions. [2021-11-19 13:29:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:29:33,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:33,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:33,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:33,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:33,236 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2021454902, now seen corresponding path program 1 times [2021-11-19 13:29:33,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:33,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990332462] [2021-11-19 13:29:33,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:33,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:33,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:33,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:29:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:33,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:34,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:34,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990332462] [2021-11-19 13:29:34,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990332462] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:34,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:34,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:34,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662583463] [2021-11-19 13:29:34,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:34,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:34,151 INFO L87 Difference]: Start difference. First operand 568 states and 911 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:34,271 INFO L93 Difference]: Finished difference Result 1105 states and 1786 transitions. [2021-11-19 13:29:34,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:34,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-19 13:29:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:34,277 INFO L225 Difference]: With dead ends: 1105 [2021-11-19 13:29:34,277 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:29:34,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 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 13:29:34,282 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 69 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:34,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2540 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:29:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:29:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6202247191011236) internal successors, (721), 464 states have internal predecessors, (721), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 910 transitions. [2021-11-19 13:29:34,305 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 910 transitions. Word has length 140 [2021-11-19 13:29:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:34,308 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 910 transitions. [2021-11-19 13:29:34,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 910 transitions. [2021-11-19 13:29:34,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:29:34,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:34,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:34,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:34,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:34,533 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:34,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1860635434, now seen corresponding path program 1 times [2021-11-19 13:29:34,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:34,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001910163] [2021-11-19 13:29:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:34,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:34,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:34,536 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:34,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:29:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:35,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:29:35,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:35,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001910163] [2021-11-19 13:29:35,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001910163] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:35,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:35,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:29:35,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024808682] [2021-11-19 13:29:35,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:35,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:35,531 INFO L87 Difference]: Start difference. First operand 568 states and 910 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:35,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:35,637 INFO L93 Difference]: Finished difference Result 1105 states and 1785 transitions. [2021-11-19 13:29:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:35,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-19 13:29:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:35,643 INFO L225 Difference]: With dead ends: 1105 [2021-11-19 13:29:35,644 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 13:29:35,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 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 13:29:35,647 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 67 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:35,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2540 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 13:29:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 13:29:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 445 states have (on average 1.6179775280898876) internal successors, (720), 464 states have internal predecessors, (720), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 909 transitions. [2021-11-19 13:29:35,671 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 909 transitions. Word has length 141 [2021-11-19 13:29:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:35,672 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 909 transitions. [2021-11-19 13:29:35,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:29:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 909 transitions. [2021-11-19 13:29:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:29:35,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:35,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:35,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:35,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,892 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 8191653, now seen corresponding path program 1 times [2021-11-19 13:29:35,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:35,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591659152] [2021-11-19 13:29:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:35,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:35,893 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:35,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:29:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:29:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:36,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:37,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:37,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591659152] [2021-11-19 13:29:37,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591659152] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:37,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:37,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:29:37,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966377883] [2021-11-19 13:29:37,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:37,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:29:37,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:29:37,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:37,086 INFO L87 Difference]: Start difference. First operand 568 states and 909 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:37,308 INFO L93 Difference]: Finished difference Result 1110 states and 1792 transitions. [2021-11-19 13:29:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-19 13:29:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:37,314 INFO L225 Difference]: With dead ends: 1110 [2021-11-19 13:29:37,314 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 13:29:37,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:37,318 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 109 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:37,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5893 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 13:29:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 570. [2021-11-19 13:29:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 447 states have (on average 1.6129753914988814) internal successors, (721), 466 states have internal predecessors, (721), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 910 transitions. [2021-11-19 13:29:37,339 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 910 transitions. Word has length 142 [2021-11-19 13:29:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:37,340 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 910 transitions. [2021-11-19 13:29:37,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 910 transitions. [2021-11-19 13:29:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:29:37,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:37,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:37,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:37,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:37,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1291035327, now seen corresponding path program 1 times [2021-11-19 13:29:37,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:37,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809492885] [2021-11-19 13:29:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:37,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:37,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:29:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:29:38,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:38,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:38,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809492885] [2021-11-19 13:29:38,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809492885] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:38,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:38,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:29:38,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389353953] [2021-11-19 13:29:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:38,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:29:38,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:38,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:29:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:38,738 INFO L87 Difference]: Start difference. First operand 570 states and 910 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:38,975 INFO L93 Difference]: Finished difference Result 1102 states and 1773 transitions. [2021-11-19 13:29:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:38,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-19 13:29:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:38,981 INFO L225 Difference]: With dead ends: 1102 [2021-11-19 13:29:38,981 INFO L226 Difference]: Without dead ends: 575 [2021-11-19 13:29:38,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:38,986 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 77 mSDsluCounter, 5048 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5901 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:38,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5901 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-19 13:29:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 572. [2021-11-19 13:29:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 449 states have (on average 1.6080178173719377) internal successors, (722), 468 states have internal predecessors, (722), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 911 transitions. [2021-11-19 13:29:39,014 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 911 transitions. Word has length 143 [2021-11-19 13:29:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:39,015 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 911 transitions. [2021-11-19 13:29:39,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:29:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 911 transitions. [2021-11-19 13:29:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 13:29:39,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:39,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:39,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:39,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:39,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -43114129, now seen corresponding path program 1 times [2021-11-19 13:29:39,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:39,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375051452] [2021-11-19 13:29:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:39,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:39,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:39,244 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:39,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:29:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:40,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:40,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375051452] [2021-11-19 13:29:40,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375051452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:40,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:40,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:29:40,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334037875] [2021-11-19 13:29:40,249 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:40,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:29:40,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:29:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:40,251 INFO L87 Difference]: Start difference. First operand 572 states and 911 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:40,400 INFO L93 Difference]: Finished difference Result 1048 states and 1700 transitions. [2021-11-19 13:29:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:29:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-19 13:29:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:40,406 INFO L225 Difference]: With dead ends: 1048 [2021-11-19 13:29:40,406 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:29:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 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 13:29:40,411 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 109 mSDsluCounter, 5121 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5986 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:40,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5986 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:29:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:29:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6153846153846154) internal successors, (714), 461 states have internal predecessors, (714), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 903 transitions. [2021-11-19 13:29:40,433 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 903 transitions. Word has length 144 [2021-11-19 13:29:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:40,434 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 903 transitions. [2021-11-19 13:29:40,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 903 transitions. [2021-11-19 13:29:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:29:40,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:40,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:40,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:40,659 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash 309035805, now seen corresponding path program 1 times [2021-11-19 13:29:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:40,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449497538] [2021-11-19 13:29:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:40,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:40,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:40,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:29:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:41,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:41,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:41,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449497538] [2021-11-19 13:29:41,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449497538] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:41,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:41,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:29:41,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599311941] [2021-11-19 13:29:41,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:41,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:29:41,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:29:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:29:41,693 INFO L87 Difference]: Start difference. First operand 565 states and 903 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:41,854 INFO L93 Difference]: Finished difference Result 1053 states and 1714 transitions. [2021-11-19 13:29:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-19 13:29:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:41,860 INFO L225 Difference]: With dead ends: 1053 [2021-11-19 13:29:41,860 INFO L226 Difference]: Without dead ends: 562 [2021-11-19 13:29:41,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 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 13:29:41,864 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 171 mSDsluCounter, 5123 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 5980 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:41,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 5980 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-19 13:29:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-19 13:29:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 439 states have (on average 1.6150341685649203) internal successors, (709), 458 states have internal predecessors, (709), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 898 transitions. [2021-11-19 13:29:41,884 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 898 transitions. Word has length 145 [2021-11-19 13:29:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 898 transitions. [2021-11-19 13:29:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 898 transitions. [2021-11-19 13:29:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:29:41,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:41,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:41,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:42,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:42,109 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1304371101, now seen corresponding path program 1 times [2021-11-19 13:29:42,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:42,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339220141] [2021-11-19 13:29:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:42,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:42,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:42,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:29:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:29:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:42,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:43,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:43,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339220141] [2021-11-19 13:29:43,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339220141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:43,240 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:43,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:29:43,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360862858] [2021-11-19 13:29:43,241 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:43,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:29:43,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:29:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:29:43,242 INFO L87 Difference]: Start difference. First operand 562 states and 898 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:29:43,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:43,368 INFO L93 Difference]: Finished difference Result 1050 states and 1709 transitions. [2021-11-19 13:29:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:29:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-19 13:29:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:43,373 INFO L225 Difference]: With dead ends: 1050 [2021-11-19 13:29:43,374 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 13:29:43,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 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 13:29:43,377 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 142 mSDsluCounter, 4217 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5073 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5073 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 13:29:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-19 13:29:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 431 states have (on average 1.6194895591647331) internal successors, (698), 450 states have internal predecessors, (698), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 887 transitions. [2021-11-19 13:29:43,397 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 887 transitions. Word has length 145 [2021-11-19 13:29:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:43,397 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 887 transitions. [2021-11-19 13:29:43,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:29:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 887 transitions. [2021-11-19 13:29:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:29:43,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:43,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:43,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:43,622 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 672711763, now seen corresponding path program 1 times [2021-11-19 13:29:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165360579] [2021-11-19 13:29:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:43,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:43,625 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:43,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:29:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:29:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:44,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:44,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165360579] [2021-11-19 13:29:44,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165360579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:44,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:44,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:44,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131302265] [2021-11-19 13:29:44,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:44,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:44,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:44,778 INFO L87 Difference]: Start difference. First operand 554 states and 887 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:44,965 INFO L93 Difference]: Finished difference Result 1036 states and 1687 transitions. [2021-11-19 13:29:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-19 13:29:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:44,971 INFO L225 Difference]: With dead ends: 1036 [2021-11-19 13:29:44,971 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 13:29:44,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 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 13:29:44,974 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 101 mSDsluCounter, 6699 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7551 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:44,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 7551 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 13:29:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-19 13:29:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 431 states have (on average 1.617169373549884) internal successors, (697), 450 states have internal predecessors, (697), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 886 transitions. [2021-11-19 13:29:44,994 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 886 transitions. Word has length 146 [2021-11-19 13:29:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:44,995 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 886 transitions. [2021-11-19 13:29:44,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 886 transitions. [2021-11-19 13:29:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 13:29:44,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:44,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:45,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:45,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:45,212 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:45,212 INFO L85 PathProgramCache]: Analyzing trace with hash 438008027, now seen corresponding path program 1 times [2021-11-19 13:29:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:45,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938082319] [2021-11-19 13:29:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:45,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:45,213 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:45,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:29:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:29:45,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:45,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:46,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:46,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938082319] [2021-11-19 13:29:46,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938082319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:46,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:46,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:46,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905172970] [2021-11-19 13:29:46,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:46,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:46,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:46,408 INFO L87 Difference]: Start difference. First operand 554 states and 886 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:46,560 INFO L93 Difference]: Finished difference Result 1080 states and 1744 transitions. [2021-11-19 13:29:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-19 13:29:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:46,566 INFO L225 Difference]: With dead ends: 1080 [2021-11-19 13:29:46,566 INFO L226 Difference]: Without dead ends: 551 [2021-11-19 13:29:46,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:46,570 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 191 mSDsluCounter, 5005 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 5845 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:46,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 5845 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-19 13:29:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2021-11-19 13:29:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 428 states have (on average 1.6098130841121496) internal successors, (689), 447 states have internal predecessors, (689), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 878 transitions. [2021-11-19 13:29:46,590 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 878 transitions. Word has length 147 [2021-11-19 13:29:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:46,591 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 878 transitions. [2021-11-19 13:29:46,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 878 transitions. [2021-11-19 13:29:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 13:29:46,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:46,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:46,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:46,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:46,816 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 882904, now seen corresponding path program 1 times [2021-11-19 13:29:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:46,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578777506] [2021-11-19 13:29:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:46,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:46,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:29:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:47,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:47,961 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:47,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578777506] [2021-11-19 13:29:47,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578777506] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:47,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:47,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:47,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949080490] [2021-11-19 13:29:47,962 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:47,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:47,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:47,964 INFO L87 Difference]: Start difference. First operand 551 states and 878 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:48,208 INFO L93 Difference]: Finished difference Result 1027 states and 1667 transitions. [2021-11-19 13:29:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-19 13:29:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:48,214 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 13:29:48,215 INFO L226 Difference]: Without dead ends: 551 [2021-11-19 13:29:48,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 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 13:29:48,218 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 68 mSDsluCounter, 7499 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 8340 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:48,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 8340 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:29:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-19 13:29:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2021-11-19 13:29:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 428 states have (on average 1.6074766355140186) internal successors, (688), 447 states have internal predecessors, (688), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 877 transitions. [2021-11-19 13:29:48,239 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 877 transitions. Word has length 148 [2021-11-19 13:29:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:48,239 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 877 transitions. [2021-11-19 13:29:48,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 877 transitions. [2021-11-19 13:29:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 13:29:48,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:48,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:48,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:48,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:48,464 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:48,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1050970516, now seen corresponding path program 1 times [2021-11-19 13:29:48,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:48,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460149460] [2021-11-19 13:29:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:48,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:48,465 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:48,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:29:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:48,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:29:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:29:49,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:49,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460149460] [2021-11-19 13:29:49,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460149460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:49,513 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:49,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:29:49,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432099509] [2021-11-19 13:29:49,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:49,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:29:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:29:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:29:49,514 INFO L87 Difference]: Start difference. First operand 551 states and 877 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:49,678 INFO L93 Difference]: Finished difference Result 1065 states and 1712 transitions. [2021-11-19 13:29:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-19 13:29:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:49,684 INFO L225 Difference]: With dead ends: 1065 [2021-11-19 13:29:49,685 INFO L226 Difference]: Without dead ends: 548 [2021-11-19 13:29:49,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:49,688 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 96 mSDsluCounter, 5812 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6651 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:49,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 6651 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:29:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-19 13:29:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-11-19 13:29:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 425 states have (on average 1.6) internal successors, (680), 444 states have internal predecessors, (680), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:29:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 869 transitions. [2021-11-19 13:29:49,748 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 869 transitions. Word has length 149 [2021-11-19 13:29:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:49,749 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 869 transitions. [2021-11-19 13:29:49,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:29:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 869 transitions. [2021-11-19 13:29:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:29:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:49,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:49,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:49,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:49,968 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1865968669, now seen corresponding path program 1 times [2021-11-19 13:29:49,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:49,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198810601] [2021-11-19 13:29:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:49,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:49,970 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:49,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:29:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:50,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:50,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:51,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:51,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198810601] [2021-11-19 13:29:51,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198810601] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:51,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:51,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:51,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017239591] [2021-11-19 13:29:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:51,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:51,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:51,159 INFO L87 Difference]: Start difference. First operand 548 states and 869 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:51,947 INFO L93 Difference]: Finished difference Result 1020 states and 1676 transitions. [2021-11-19 13:29:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-19 13:29:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:51,952 INFO L225 Difference]: With dead ends: 1020 [2021-11-19 13:29:51,952 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 13:29:51,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:51,964 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 785 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:51,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2129 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:29:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 13:29:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 13:29:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 428 states have (on average 1.5957943925233644) internal successors, (683), 447 states have internal predecessors, (683), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:29:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 873 transitions. [2021-11-19 13:29:51,997 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 873 transitions. Word has length 150 [2021-11-19 13:29:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:51,998 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 873 transitions. [2021-11-19 13:29:51,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 873 transitions. [2021-11-19 13:29:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 13:29:52,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:52,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:52,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:52,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:52,216 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1411770203, now seen corresponding path program 1 times [2021-11-19 13:29:52,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:52,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857022298] [2021-11-19 13:29:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:52,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:52,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:52,218 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:52,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 13:29:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:52,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:53,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:53,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857022298] [2021-11-19 13:29:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857022298] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:53,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:53,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375608205] [2021-11-19 13:29:53,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:53,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:53,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:53,412 INFO L87 Difference]: Start difference. First operand 552 states and 873 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:54,137 INFO L93 Difference]: Finished difference Result 1029 states and 1683 transitions. [2021-11-19 13:29:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-19 13:29:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:54,141 INFO L225 Difference]: With dead ends: 1029 [2021-11-19 13:29:54,141 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 13:29:54,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:54,145 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 783 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:54,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2130 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:29:54,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 13:29:54,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 13:29:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.5902777777777777) internal successors, (687), 451 states have internal predecessors, (687), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-19 13:29:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 878 transitions. [2021-11-19 13:29:54,167 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 878 transitions. Word has length 152 [2021-11-19 13:29:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:54,168 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 878 transitions. [2021-11-19 13:29:54,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 878 transitions. [2021-11-19 13:29:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 13:29:54,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:54,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:54,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:54,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:54,393 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1072752355, now seen corresponding path program 1 times [2021-11-19 13:29:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:54,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824201044] [2021-11-19 13:29:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:54,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:54,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:54,395 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:54,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 13:29:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:55,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:55,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:55,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824201044] [2021-11-19 13:29:55,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824201044] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:55,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:55,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:55,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836900367] [2021-11-19 13:29:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:55,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:55,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:55,495 INFO L87 Difference]: Start difference. First operand 557 states and 878 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:56,277 INFO L93 Difference]: Finished difference Result 1040 states and 1692 transitions. [2021-11-19 13:29:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:56,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-19 13:29:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:56,281 INFO L225 Difference]: With dead ends: 1040 [2021-11-19 13:29:56,281 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 13:29:56,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:56,286 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 783 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:56,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 2130 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:29:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 13:29:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 13:29:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.5835240274599542) internal successors, (692), 456 states have internal predecessors, (692), 97 states have call successors, (97), 29 states have call predecessors, (97), 28 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-19 13:29:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 884 transitions. [2021-11-19 13:29:56,315 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 884 transitions. Word has length 154 [2021-11-19 13:29:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:56,315 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 884 transitions. [2021-11-19 13:29:56,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 884 transitions. [2021-11-19 13:29:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 13:29:56,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:56,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:56,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:56,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:56,537 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -965478115, now seen corresponding path program 1 times [2021-11-19 13:29:56,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:56,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112452195] [2021-11-19 13:29:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:56,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:56,540 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:56,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:29:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:29:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:29:57,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:57,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112452195] [2021-11-19 13:29:57,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112452195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:29:57,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:29:57,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 13:29:57,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837589037] [2021-11-19 13:29:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:57,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:29:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:29:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:29:57,751 INFO L87 Difference]: Start difference. First operand 563 states and 884 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:58,351 INFO L93 Difference]: Finished difference Result 1053 states and 1703 transitions. [2021-11-19 13:29:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-19 13:29:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:58,356 INFO L225 Difference]: With dead ends: 1053 [2021-11-19 13:29:58,356 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:29:58,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:29:58,359 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 775 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:58,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2130 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:29:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:29:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 13:29:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 443 states have (on average 1.5756207674943568) internal successors, (698), 462 states have internal predecessors, (698), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-19 13:29:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 891 transitions. [2021-11-19 13:29:58,420 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 891 transitions. Word has length 156 [2021-11-19 13:29:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:58,421 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 891 transitions. [2021-11-19 13:29:58,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:29:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 891 transitions. [2021-11-19 13:29:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 13:29:58,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:58,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:58,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:58,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:58,645 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 456057885, now seen corresponding path program 1 times [2021-11-19 13:29:58,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:58,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516179061] [2021-11-19 13:29:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:58,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:58,648 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:58,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 13:29:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:29:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:29:59,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:30:00,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516179061] [2021-11-19 13:30:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516179061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:00,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966107011] [2021-11-19 13:30:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:00,544 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:00,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:00,549 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:00,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 13:30:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:30:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:30:01,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:30:02,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966107011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:02,026 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:30:02,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 13:30:02,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070335522] [2021-11-19 13:30:02,027 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:30:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:30:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:30:02,029 INFO L87 Difference]: Start difference. First operand 570 states and 891 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:30:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:02,572 INFO L93 Difference]: Finished difference Result 1056 states and 1689 transitions. [2021-11-19 13:30:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:30:02,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 158 [2021-11-19 13:30:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:02,577 INFO L225 Difference]: With dead ends: 1056 [2021-11-19 13:30:02,577 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 13:30:02,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:30:02,579 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 1268 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:02,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 769 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:30:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 13:30:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 13:30:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 441 states have (on average 1.5714285714285714) internal successors, (693), 459 states have internal predecessors, (693), 95 states have call successors, (95), 30 states have call predecessors, (95), 29 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-19 13:30:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 883 transitions. [2021-11-19 13:30:02,601 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 883 transitions. Word has length 158 [2021-11-19 13:30:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:02,602 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 883 transitions. [2021-11-19 13:30:02,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 13:30:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 883 transitions. [2021-11-19 13:30:02,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 13:30:02,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:02,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:02,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 13:30:02,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:03,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:03,027 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1252752268, now seen corresponding path program 1 times [2021-11-19 13:30:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:03,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592483464] [2021-11-19 13:30:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:03,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:03,029 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:03,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:30:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:03,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:30:03,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:30:04,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:04,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592483464] [2021-11-19 13:30:04,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592483464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:04,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056516661] [2021-11-19 13:30:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:04,756 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:04,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:04,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 13:30:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:30:05,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:30:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2056516661] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:06,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435722380] [2021-11-19 13:30:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:06,251 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 13:30:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:30:06,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 13:30:07,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435722380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:07,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:30:07,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 13:30:07,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268940561] [2021-11-19 13:30:07,587 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:30:07,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:30:07,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:30:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:30:07,589 INFO L87 Difference]: Start difference. First operand 566 states and 883 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 13:30:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:16,319 INFO L93 Difference]: Finished difference Result 1803 states and 2936 transitions. [2021-11-19 13:30:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:30:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-19 13:30:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:16,327 INFO L225 Difference]: With dead ends: 1803 [2021-11-19 13:30:16,327 INFO L226 Difference]: Without dead ends: 1317 [2021-11-19 13:30:16,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:30:16,331 INFO L933 BasicCegarLoop]: 1675 mSDtfsCounter, 4856 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 10108 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4932 SdHoareTripleChecker+Valid, 7174 SdHoareTripleChecker+Invalid, 11882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 10108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:16,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4932 Valid, 7174 Invalid, 11882 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1774 Valid, 10108 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-19 13:30:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-11-19 13:30:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1167. [2021-11-19 13:30:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 888 states have (on average 1.5934684684684686) internal successors, (1415), 927 states have internal predecessors, (1415), 219 states have call successors, (219), 53 states have call predecessors, (219), 59 states have return successors, (242), 217 states have call predecessors, (242), 215 states have call successors, (242) [2021-11-19 13:30:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1876 transitions. [2021-11-19 13:30:16,403 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1876 transitions. Word has length 159 [2021-11-19 13:30:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:16,403 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1876 transitions. [2021-11-19 13:30:16,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 13:30:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1876 transitions. [2021-11-19 13:30:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 13:30:16,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:16,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:16,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:16,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:16,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:17,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:17,030 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:17,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1078948327, now seen corresponding path program 1 times [2021-11-19 13:30:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:17,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160041756] [2021-11-19 13:30:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:17,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:17,032 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:17,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 13:30:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:30:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:30:17,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:30:18,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:18,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160041756] [2021-11-19 13:30:18,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160041756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:18,122 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:18,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 13:30:18,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065788772] [2021-11-19 13:30:18,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 13:30:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 13:30:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:30:18,124 INFO L87 Difference]: Start difference. First operand 1167 states and 1876 transitions. Second operand has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:30:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:18,272 INFO L93 Difference]: Finished difference Result 1656 states and 2670 transitions. [2021-11-19 13:30:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:30:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-19 13:30:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:18,278 INFO L225 Difference]: With dead ends: 1656 [2021-11-19 13:30:18,278 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:30:18,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:30:18,283 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 112 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5698 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:18,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 5698 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:30:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:30:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:30:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.56651376146789) internal successors, (683), 454 states have internal predecessors, (683), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-19 13:30:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 869 transitions. [2021-11-19 13:30:18,305 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 869 transitions. Word has length 161 [2021-11-19 13:30:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:18,306 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 869 transitions. [2021-11-19 13:30:18,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:30:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 869 transitions. [2021-11-19 13:30:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 13:30:18,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:18,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:18,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 13:30:18,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:18,529 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1308062692, now seen corresponding path program 1 times [2021-11-19 13:30:18,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:18,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787269480] [2021-11-19 13:30:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:18,532 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:18,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 13:30:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:30:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:30:19,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:30:20,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:20,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787269480] [2021-11-19 13:30:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787269480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:20,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693493338] [2021-11-19 13:30:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:20,195 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:20,196 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:20,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 13:30:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:30:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:30:20,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:30:21,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693493338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:21,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590733995] [2021-11-19 13:30:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:21,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:21,674 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:21,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 13:30:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:30:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 13:30:22,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:30:23,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590733995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:23,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:30:23,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 13:30:23,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647394291] [2021-11-19 13:30:23,035 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:30:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:30:23,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:23,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:30:23,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:30:23,037 INFO L87 Difference]: Start difference. First operand 559 states and 869 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 13:30:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:25,112 INFO L93 Difference]: Finished difference Result 1046 states and 1668 transitions. [2021-11-19 13:30:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:30:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-19 13:30:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:25,116 INFO L225 Difference]: With dead ends: 1046 [2021-11-19 13:30:25,116 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:30:25,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:30:25,119 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 1300 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:25,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 2245 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2787 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 13:30:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:30:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 563. [2021-11-19 13:30:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 439 states have (on average 1.5626423690205011) internal successors, (686), 457 states have internal predecessors, (686), 93 states have call successors, (93), 30 states have call predecessors, (93), 30 states have return successors, (98), 88 states have call predecessors, (98), 89 states have call successors, (98) [2021-11-19 13:30:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 877 transitions. [2021-11-19 13:30:25,141 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 877 transitions. Word has length 165 [2021-11-19 13:30:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:25,141 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 877 transitions. [2021-11-19 13:30:25,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 13:30:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 877 transitions. [2021-11-19 13:30:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 13:30:25,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:25,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:25,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-19 13:30:25,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 13:30:25,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-19 13:30:25,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:25,747 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -116940638, now seen corresponding path program 1 times [2021-11-19 13:30:25,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:25,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150668981] [2021-11-19 13:30:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:25,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:25,752 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:25,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 13:30:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:30:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:26,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:26,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:26,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150668981] [2021-11-19 13:30:26,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150668981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:26,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575936166] [2021-11-19 13:30:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:26,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:26,943 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:26,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 13:30:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:30:27,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:27,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575936166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:27,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591609875] [2021-11-19 13:30:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:27,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:27,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:27,998 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:28,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 13:30:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:28,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:30:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:28,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:30:29,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591609875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:29,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:30:29,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 13:30:29,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713688894] [2021-11-19 13:30:29,085 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:30:29,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:30:29,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:29,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:30:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:30:29,087 INFO L87 Difference]: Start difference. First operand 563 states and 877 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:30:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:33,563 INFO L93 Difference]: Finished difference Result 2011 states and 3253 transitions. [2021-11-19 13:30:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:30:33,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-19 13:30:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:33,578 INFO L225 Difference]: With dead ends: 2011 [2021-11-19 13:30:33,578 INFO L226 Difference]: Without dead ends: 1526 [2021-11-19 13:30:33,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:30:33,582 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 5408 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 4563 mSolverCounterSat, 1563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5487 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 6126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1563 IncrementalHoareTripleChecker+Valid, 4563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:33,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5487 Valid, 3207 Invalid, 6126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1563 Valid, 4563 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 13:30:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-11-19 13:30:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1468. [2021-11-19 13:30:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1137 states have (on average 1.586631486367634) internal successors, (1804), 1182 states have internal predecessors, (1804), 253 states have call successors, (253), 77 states have call predecessors, (253), 77 states have return successors, (282), 245 states have call predecessors, (282), 249 states have call successors, (282) [2021-11-19 13:30:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2339 transitions. [2021-11-19 13:30:33,706 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2339 transitions. Word has length 166 [2021-11-19 13:30:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:33,706 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 2339 transitions. [2021-11-19 13:30:33,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:30:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2339 transitions. [2021-11-19 13:30:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 13:30:33,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:33,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:33,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-19 13:30:33,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-19 13:30:34,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:34,324 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 204526218, now seen corresponding path program 1 times [2021-11-19 13:30:34,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:34,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566260265] [2021-11-19 13:30:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:34,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:34,326 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:34,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 13:30:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:34,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:30:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:30:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:30:35,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:35,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566260265] [2021-11-19 13:30:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566260265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:35,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:35,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:30:35,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935065509] [2021-11-19 13:30:35,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:30:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:30:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:30:35,633 INFO L87 Difference]: Start difference. First operand 1468 states and 2339 transitions. Second operand has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 13:30:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:41,869 INFO L93 Difference]: Finished difference Result 5224 states and 8634 transitions. [2021-11-19 13:30:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:30:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 168 [2021-11-19 13:30:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:41,900 INFO L225 Difference]: With dead ends: 5224 [2021-11-19 13:30:41,901 INFO L226 Difference]: Without dead ends: 3834 [2021-11-19 13:30:41,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:30:41,909 INFO L933 BasicCegarLoop]: 1652 mSDtfsCounter, 2324 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 7070 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2422 SdHoareTripleChecker+Valid, 4883 SdHoareTripleChecker+Invalid, 7926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 7070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:41,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2422 Valid, 4883 Invalid, 7926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 7070 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-19 13:30:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-11-19 13:30:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3380. [2021-11-19 13:30:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2504 states have (on average 1.58426517571885) internal successors, (3967), 2645 states have internal predecessors, (3967), 716 states have call successors, (716), 146 states have call predecessors, (716), 159 states have return successors, (838), 710 states have call predecessors, (838), 712 states have call successors, (838) [2021-11-19 13:30:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 5521 transitions. [2021-11-19 13:30:42,188 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 5521 transitions. Word has length 168 [2021-11-19 13:30:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:42,189 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 5521 transitions. [2021-11-19 13:30:42,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 13:30:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 5521 transitions. [2021-11-19 13:30:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 13:30:42,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:42,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:42,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:42,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:42,408 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1970153879, now seen corresponding path program 1 times [2021-11-19 13:30:42,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:42,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760735519] [2021-11-19 13:30:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:42,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:42,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:42,411 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:42,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 13:30:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:30:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:30:43,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:30:43,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:43,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760735519] [2021-11-19 13:30:43,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760735519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:43,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:43,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:30:43,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395276738] [2021-11-19 13:30:43,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:43,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:30:43,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:30:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:30:43,730 INFO L87 Difference]: Start difference. First operand 3380 states and 5521 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-19 13:30:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:48,646 INFO L93 Difference]: Finished difference Result 9368 states and 15397 transitions. [2021-11-19 13:30:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:30:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-19 13:30:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:48,687 INFO L225 Difference]: With dead ends: 9368 [2021-11-19 13:30:48,688 INFO L226 Difference]: Without dead ends: 6859 [2021-11-19 13:30:48,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:30:48,698 INFO L933 BasicCegarLoop]: 1006 mSDtfsCounter, 3192 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3264 SdHoareTripleChecker+Valid, 3165 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:48,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3264 Valid, 3165 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 13:30:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2021-11-19 13:30:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6577. [2021-11-19 13:30:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6577 states, 4905 states have (on average 1.5779816513761469) internal successors, (7740), 5173 states have internal predecessors, (7740), 1330 states have call successors, (1330), 280 states have call predecessors, (1330), 341 states have return successors, (1681), 1325 states have call predecessors, (1681), 1326 states have call successors, (1681) [2021-11-19 13:30:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6577 states to 6577 states and 10751 transitions. [2021-11-19 13:30:49,259 INFO L78 Accepts]: Start accepts. Automaton has 6577 states and 10751 transitions. Word has length 168 [2021-11-19 13:30:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:49,260 INFO L470 AbstractCegarLoop]: Abstraction has 6577 states and 10751 transitions. [2021-11-19 13:30:49,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-19 13:30:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6577 states and 10751 transitions. [2021-11-19 13:30:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 13:30:49,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:49,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:49,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:49,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:49,477 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:49,478 INFO L85 PathProgramCache]: Analyzing trace with hash 303274537, now seen corresponding path program 1 times [2021-11-19 13:30:49,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:49,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485524764] [2021-11-19 13:30:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:49,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:49,479 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 13:30:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:30:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:30:50,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 13:30:51,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:51,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485524764] [2021-11-19 13:30:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485524764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:51,149 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:51,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 13:30:51,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017685820] [2021-11-19 13:30:51,150 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:51,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:30:51,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:30:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:30:51,152 INFO L87 Difference]: Start difference. First operand 6577 states and 10751 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 13:30:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:54,269 INFO L93 Difference]: Finished difference Result 12231 states and 20061 transitions. [2021-11-19 13:30:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:30:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-19 13:30:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:54,309 INFO L225 Difference]: With dead ends: 12231 [2021-11-19 13:30:54,309 INFO L226 Difference]: Without dead ends: 6529 [2021-11-19 13:30:54,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:30:54,330 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 1523 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4211 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 4580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 4211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:54,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 3133 Invalid, 4580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 4211 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 13:30:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6529 states. [2021-11-19 13:30:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6529 to 6529. [2021-11-19 13:30:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 4879 states have (on average 1.5781922525107603) internal successors, (7700), 5143 states have internal predecessors, (7700), 1316 states have call successors, (1316), 276 states have call predecessors, (1316), 333 states have return successors, (1659), 1311 states have call predecessors, (1659), 1312 states have call successors, (1659) [2021-11-19 13:30:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 10675 transitions. [2021-11-19 13:30:54,811 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 10675 transitions. Word has length 170 [2021-11-19 13:30:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 6529 states and 10675 transitions. [2021-11-19 13:30:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 13:30:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 10675 transitions. [2021-11-19 13:30:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 13:30:54,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:54,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:30:54,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-19 13:30:55,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:55,032 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1793341066, now seen corresponding path program 1 times [2021-11-19 13:30:55,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:55,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381995846] [2021-11-19 13:30:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:55,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:55,035 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 13:30:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:55,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:30:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:30:56,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:30:56,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:56,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381995846] [2021-11-19 13:30:56,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381995846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:56,864 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:56,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 13:30:56,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892562126] [2021-11-19 13:30:56,865 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:56,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:30:56,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:56,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:30:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:30:56,866 INFO L87 Difference]: Start difference. First operand 6529 states and 10675 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-19 13:31:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:03,825 INFO L93 Difference]: Finished difference Result 17343 states and 28381 transitions. [2021-11-19 13:31:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:31:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-19 13:31:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:03,897 INFO L225 Difference]: With dead ends: 17343 [2021-11-19 13:31:03,899 INFO L226 Difference]: Without dead ends: 11573 [2021-11-19 13:31:03,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:31:03,928 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 3224 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 6971 mSolverCounterSat, 882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 3477 SdHoareTripleChecker+Invalid, 7853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 882 IncrementalHoareTripleChecker+Valid, 6971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:03,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3299 Valid, 3477 Invalid, 7853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [882 Valid, 6971 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-19 13:31:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-11-19 13:31:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 11489. [2021-11-19 13:31:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11489 states, 8539 states have (on average 1.564117578170746) internal successors, (13356), 9010 states have internal predecessors, (13356), 2332 states have call successors, (2332), 517 states have call predecessors, (2332), 617 states have return successors, (2981), 2321 states have call predecessors, (2981), 2328 states have call successors, (2981) [2021-11-19 13:31:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11489 states to 11489 states and 18669 transitions. [2021-11-19 13:31:04,788 INFO L78 Accepts]: Start accepts. Automaton has 11489 states and 18669 transitions. Word has length 173 [2021-11-19 13:31:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:04,788 INFO L470 AbstractCegarLoop]: Abstraction has 11489 states and 18669 transitions. [2021-11-19 13:31:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-19 13:31:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 11489 states and 18669 transitions. [2021-11-19 13:31:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 13:31:04,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:04,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:04,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:05,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:05,008 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:05,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:05,008 INFO L85 PathProgramCache]: Analyzing trace with hash 224135948, now seen corresponding path program 1 times [2021-11-19 13:31:05,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:05,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234136700] [2021-11-19 13:31:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:05,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:05,010 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:05,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 13:31:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:05,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:31:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:31:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:31:06,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:06,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234136700] [2021-11-19 13:31:06,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234136700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:06,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:06,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:31:06,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136885710] [2021-11-19 13:31:06,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:06,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:31:06,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:31:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:31:06,103 INFO L87 Difference]: Start difference. First operand 11489 states and 18669 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:31:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:06,887 INFO L93 Difference]: Finished difference Result 22755 states and 37269 transitions. [2021-11-19 13:31:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:31:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-19 13:31:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:06,956 INFO L225 Difference]: With dead ends: 22755 [2021-11-19 13:31:06,956 INFO L226 Difference]: Without dead ends: 11489 [2021-11-19 13:31:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:31:06,995 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 636 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:06,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 2998 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:31:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2021-11-19 13:31:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11489. [2021-11-19 13:31:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11489 states, 8539 states have (on average 1.5495959714252254) internal successors, (13232), 9010 states have internal predecessors, (13232), 2332 states have call successors, (2332), 517 states have call predecessors, (2332), 617 states have return successors, (2981), 2321 states have call predecessors, (2981), 2328 states have call successors, (2981) [2021-11-19 13:31:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11489 states to 11489 states and 18545 transitions. [2021-11-19 13:31:08,015 INFO L78 Accepts]: Start accepts. Automaton has 11489 states and 18545 transitions. Word has length 180 [2021-11-19 13:31:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:08,015 INFO L470 AbstractCegarLoop]: Abstraction has 11489 states and 18545 transitions. [2021-11-19 13:31:08,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 13:31:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 11489 states and 18545 transitions. [2021-11-19 13:31:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 13:31:08,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:08,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:08,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:08,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:08,241 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1726025487, now seen corresponding path program 1 times [2021-11-19 13:31:08,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:08,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222891226] [2021-11-19 13:31:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:08,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:08,243 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 13:31:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:31:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 13:31:09,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 13:31:09,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:09,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222891226] [2021-11-19 13:31:09,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222891226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:09,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:09,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 13:31:09,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689554410] [2021-11-19 13:31:09,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:09,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:31:09,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:09,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:31:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:09,590 INFO L87 Difference]: Start difference. First operand 11489 states and 18545 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:31:13,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:13,057 INFO L93 Difference]: Finished difference Result 22984 states and 37271 transitions. [2021-11-19 13:31:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 13:31:13,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-19 13:31:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:13,136 INFO L225 Difference]: With dead ends: 22984 [2021-11-19 13:31:13,136 INFO L226 Difference]: Without dead ends: 12551 [2021-11-19 13:31:13,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:31:13,175 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 3874 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 2818 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3951 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 2818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:13,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3951 Valid, 2010 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 2818 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 13:31:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-11-19 13:31:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 11853. [2021-11-19 13:31:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11853 states, 8811 states have (on average 1.5421632050845533) internal successors, (13588), 9302 states have internal predecessors, (13588), 2370 states have call successors, (2370), 553 states have call predecessors, (2370), 671 states have return successors, (3067), 2357 states have call predecessors, (3067), 2366 states have call successors, (3067) [2021-11-19 13:31:14,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11853 states to 11853 states and 19025 transitions. [2021-11-19 13:31:14,129 INFO L78 Accepts]: Start accepts. Automaton has 11853 states and 19025 transitions. Word has length 185 [2021-11-19 13:31:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:14,131 INFO L470 AbstractCegarLoop]: Abstraction has 11853 states and 19025 transitions. [2021-11-19 13:31:14,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 13:31:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 11853 states and 19025 transitions. [2021-11-19 13:31:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 13:31:14,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:14,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:14,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:14,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:14,345 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1585619491, now seen corresponding path program 1 times [2021-11-19 13:31:14,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:14,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542339784] [2021-11-19 13:31:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:14,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:14,347 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:14,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 13:31:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:31:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:31:15,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:31:16,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:16,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542339784] [2021-11-19 13:31:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542339784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:16,126 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-19 13:31:16,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54704804] [2021-11-19 13:31:16,127 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:16,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 13:31:16,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 13:31:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-19 13:31:16,128 INFO L87 Difference]: Start difference. First operand 11853 states and 19025 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 13:31:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:24,626 INFO L93 Difference]: Finished difference Result 31420 states and 52118 transitions. [2021-11-19 13:31:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 13:31:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-19 13:31:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:24,857 INFO L225 Difference]: With dead ends: 31420 [2021-11-19 13:31:24,857 INFO L226 Difference]: Without dead ends: 18815 [2021-11-19 13:31:24,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:31:24,916 INFO L933 BasicCegarLoop]: 1148 mSDtfsCounter, 3486 mSDsluCounter, 3853 mSDsCounter, 0 mSdLazyCounter, 7718 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3583 SdHoareTripleChecker+Valid, 5001 SdHoareTripleChecker+Invalid, 8706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 7718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:24,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3583 Valid, 5001 Invalid, 8706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 7718 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-11-19 13:31:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18815 states. [2021-11-19 13:31:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18815 to 17697. [2021-11-19 13:31:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17697 states, 13173 states have (on average 1.5341987398466561) internal successors, (20210), 13916 states have internal predecessors, (20210), 3516 states have call successors, (3516), 841 states have call predecessors, (3516), 1007 states have return successors, (4735), 3459 states have call predecessors, (4735), 3512 states have call successors, (4735) [2021-11-19 13:31:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17697 states to 17697 states and 28461 transitions. [2021-11-19 13:31:26,519 INFO L78 Accepts]: Start accepts. Automaton has 17697 states and 28461 transitions. Word has length 190 [2021-11-19 13:31:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:26,519 INFO L470 AbstractCegarLoop]: Abstraction has 17697 states and 28461 transitions. [2021-11-19 13:31:26,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 13:31:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17697 states and 28461 transitions. [2021-11-19 13:31:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 13:31:26,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:26,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:26,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:26,723 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:26,723 INFO L85 PathProgramCache]: Analyzing trace with hash 813671321, now seen corresponding path program 1 times [2021-11-19 13:31:26,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:26,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853086718] [2021-11-19 13:31:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:26,725 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 13:31:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 13:31:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:31:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 13:31:28,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:28,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853086718] [2021-11-19 13:31:28,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853086718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:28,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:31:28,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 13:31:28,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371471335] [2021-11-19 13:31:28,186 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:31:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:31:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:31:28,187 INFO L87 Difference]: Start difference. First operand 17697 states and 28461 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-19 13:31:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:35,609 INFO L93 Difference]: Finished difference Result 48000 states and 78069 transitions. [2021-11-19 13:31:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:31:35,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-19 13:31:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:35,778 INFO L225 Difference]: With dead ends: 48000 [2021-11-19 13:31:35,778 INFO L226 Difference]: Without dead ends: 31364 [2021-11-19 13:31:35,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 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 13:31:35,837 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 3603 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 5646 mSolverCounterSat, 1013 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3675 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1013 IncrementalHoareTripleChecker+Valid, 5646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:35,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3675 Valid, 3096 Invalid, 6659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1013 Valid, 5646 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 13:31:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31364 states. [2021-11-19 13:31:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31364 to 31212. [2021-11-19 13:31:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31212 states, 23128 states have (on average 1.5412054652369422) internal successors, (35645), 24440 states have internal predecessors, (35645), 6370 states have call successors, (6370), 1533 states have call predecessors, (6370), 1713 states have return successors, (8258), 6238 states have call predecessors, (8258), 6366 states have call successors, (8258) [2021-11-19 13:31:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31212 states to 31212 states and 50273 transitions. [2021-11-19 13:31:38,286 INFO L78 Accepts]: Start accepts. Automaton has 31212 states and 50273 transitions. Word has length 190 [2021-11-19 13:31:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 31212 states and 50273 transitions. [2021-11-19 13:31:38,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-19 13:31:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31212 states and 50273 transitions. [2021-11-19 13:31:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 13:31:38,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:38,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:38,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:38,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:38,491 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1835163626, now seen corresponding path program 1 times [2021-11-19 13:31:38,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:38,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210648916] [2021-11-19 13:31:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:38,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:38,495 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:38,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-19 13:31:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:31:38,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:39,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:39,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:39,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210648916] [2021-11-19 13:31:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210648916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:39,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324551880] [2021-11-19 13:31:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:39,913 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:39,914 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:39,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-19 13:31:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:31:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:31:40,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:31:40,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324551880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:40,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:31:40,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 13:31:40,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396312876] [2021-11-19 13:31:40,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:40,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:31:40,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:31:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:40,866 INFO L87 Difference]: Start difference. First operand 31212 states and 50273 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 13:31:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:44,514 INFO L93 Difference]: Finished difference Result 93016 states and 151127 transitions. [2021-11-19 13:31:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:31:44,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-19 13:31:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:45,002 INFO L225 Difference]: With dead ends: 93016 [2021-11-19 13:31:45,002 INFO L226 Difference]: Without dead ends: 61883 [2021-11-19 13:31:45,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:45,091 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 761 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 2189 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 13:31:45,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 2189 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:31:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61883 states. [2021-11-19 13:31:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61883 to 61185. [2021-11-19 13:31:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61185 states, 45356 states have (on average 1.5365772995855014) internal successors, (69693), 47928 states have internal predecessors, (69693), 12432 states have call successors, (12432), 3034 states have call predecessors, (12432), 3396 states have return successors, (16838), 12222 states have call predecessors, (16838), 12428 states have call successors, (16838) [2021-11-19 13:31:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61185 states to 61185 states and 98963 transitions. [2021-11-19 13:31:49,927 INFO L78 Accepts]: Start accepts. Automaton has 61185 states and 98963 transitions. Word has length 191 [2021-11-19 13:31:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 61185 states and 98963 transitions. [2021-11-19 13:31:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 13:31:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 61185 states and 98963 transitions. [2021-11-19 13:31:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 13:31:49,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:49,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:31:50,151 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Forcibly destroying the process [2021-11-19 13:31:50,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:50,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:50,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:50,372 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1055361185, now seen corresponding path program 1 times [2021-11-19 13:31:50,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:50,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776496954] [2021-11-19 13:31:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:50,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:50,374 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:50,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-19 13:31:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:31:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:51,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:51,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:51,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776496954] [2021-11-19 13:31:51,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776496954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:51,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385082288] [2021-11-19 13:31:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:51,752 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:51,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:51,753 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:51,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-19 13:31:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 13:31:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385082288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:53,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854874258] [2021-11-19 13:31:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:53,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:31:53,026 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:31:53,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 13:31:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:31:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:53,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 13:31:54,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854874258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:54,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:31:54,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-19 13:31:54,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360999316] [2021-11-19 13:31:54,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:31:54,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:31:54,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:31:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:31:54,324 INFO L87 Difference]: Start difference. First operand 61185 states and 98963 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 13:32:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:00,679 INFO L93 Difference]: Finished difference Result 93638 states and 151332 transitions. [2021-11-19 13:32:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:32:00,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-19 13:32:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:01,223 INFO L225 Difference]: With dead ends: 93638 [2021-11-19 13:32:01,223 INFO L226 Difference]: Without dead ends: 63657 [2021-11-19 13:32:01,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:32:01,344 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 3258 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3330 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 3113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:01,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3330 Valid, 1803 Invalid, 3113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:32:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63657 states. [2021-11-19 13:32:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63657 to 61861. [2021-11-19 13:32:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61861 states, 45828 states have (on average 1.5305053678973553) internal successors, (70140), 48564 states have internal predecessors, (70140), 12480 states have call successors, (12480), 3042 states have call predecessors, (12480), 3552 states have return successors, (16794), 12254 states have call predecessors, (16794), 12476 states have call successors, (16794) [2021-11-19 13:32:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61861 states to 61861 states and 99414 transitions. [2021-11-19 13:32:06,013 INFO L78 Accepts]: Start accepts. Automaton has 61861 states and 99414 transitions. Word has length 192 [2021-11-19 13:32:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:06,013 INFO L470 AbstractCegarLoop]: Abstraction has 61861 states and 99414 transitions. [2021-11-19 13:32:06,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 13:32:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 61861 states and 99414 transitions. [2021-11-19 13:32:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 13:32:06,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:06,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:32:06,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:06,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-19 13:32:06,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-19 13:32:06,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:32:06,618 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 544244624, now seen corresponding path program 1 times [2021-11-19 13:32:06,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:06,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486008821] [2021-11-19 13:32:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:06,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:06,620 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:06,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f73525c4-f73e-4469-92e7-5978e37dd921/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 13:32:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:32:06,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:32:07,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 13:32:07,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:07,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486008821] [2021-11-19 13:32:07,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486008821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:07,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:07,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 13:32:07,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544658965] [2021-11-19 13:32:07,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:07,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:32:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:32:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:32:07,749 INFO L87 Difference]: Start difference. First operand 61861 states and 99414 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29)