./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.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_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/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_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/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_3407f032-8544-4db2-a236-d83760ff2ed9/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 e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:36,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:36,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:36,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:36,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:36,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:36,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:36,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:36,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:36,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:36,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:36,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:36,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:36,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:36,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:36,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:36,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:36,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:36,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:36,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:36,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:36,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:36,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:36,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:36,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:36,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:36,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:36,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:36,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:36,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:36,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:36,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:36,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:36,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:36,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:36,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:36,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:36,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:36,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:36,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:36,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:36,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:36,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:36,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:36,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:36,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:36,535 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:36,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:36,536 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:36,536 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:36,536 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:36,536 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:36,537 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:36,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:36,538 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:36,538 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:36,538 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:36,539 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:36,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:36,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:36,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:36,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:36,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:36,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:36,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:36,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:36,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:36,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:36,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:36,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:36,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:36,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:36,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:36,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:36,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:36,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:36,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:36,553 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:36,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:36,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:36,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:36,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:36,555 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_3407f032-8544-4db2-a236-d83760ff2ed9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-19 14:16:36,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:36,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:36,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:36,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:36,886 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:36,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-19 14:16:36,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/77216c0b2/d0a7f1f3ab204ce4a561d5b9cedb412b/FLAGc17e83918 [2021-11-19 14:16:37,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:37,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-19 14:16:37,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/77216c0b2/d0a7f1f3ab204ce4a561d5b9cedb412b/FLAGc17e83918 [2021-11-19 14:16:37,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/77216c0b2/d0a7f1f3ab204ce4a561d5b9cedb412b [2021-11-19 14:16:37,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:37,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:37,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:37,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:37,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:37,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:37" (1/1) ... [2021-11-19 14:16:37,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2edd8af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:37, skipping insertion in model container [2021-11-19 14:16:37,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:37" (1/1) ... [2021-11-19 14:16:38,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:38,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:38,311 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_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-19 14:16:38,739 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:38,762 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 14:16:38,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b21011a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:38, skipping insertion in model container [2021-11-19 14:16:38,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:38,763 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:16:38,766 INFO L158 Benchmark]: Toolchain (without parser) took 778.29ms. Allocated memory is still 98.6MB. Free memory was 76.3MB in the beginning and 74.3MB in the end (delta: 2.0MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2021-11-19 14:16:38,767 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 79.7MB. Free memory was 54.5MB in the beginning and 54.4MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:16:38,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 775.58ms. Allocated memory is still 98.6MB. Free memory was 76.0MB in the beginning and 74.3MB in the end (delta: 1.7MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2021-11-19 14:16:38,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 79.7MB. Free memory was 54.5MB in the beginning and 54.4MB in the end (delta: 36.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 775.58ms. Allocated memory is still 98.6MB. Free memory was 76.0MB in the beginning and 74.3MB in the end (delta: 1.7MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: 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_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/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_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/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_3407f032-8544-4db2-a236-d83760ff2ed9/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 e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:41,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:41,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:41,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:41,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:41,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:41,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:41,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:41,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:41,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:41,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:41,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:41,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:41,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:41,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:41,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:41,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:41,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:41,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:41,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:41,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:41,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:41,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:41,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:41,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:41,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:41,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:41,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:41,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:41,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:41,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:41,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:41,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:41,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:41,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:41,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:41,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:41,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:41,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:41,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:41,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:41,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:16:41,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:41,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:41,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:41,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:41,391 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:41,394 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:41,394 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:41,394 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:41,395 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:41,395 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:41,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:41,398 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:41,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:41,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:41,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:41,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:41,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:41,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:41,400 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:16:41,400 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:16:41,401 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:41,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:41,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:41,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:41,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:41,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:16:41,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:41,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:41,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:41,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:41,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:41,404 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:16:41,404 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:16:41,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:41,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:41,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:41,405 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_3407f032-8544-4db2-a236-d83760ff2ed9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-19 14:16:41,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:41,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:41,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:41,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:41,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:41,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-19 14:16:41,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/1bd31dd90/e1e51180a1f84f3cb58dc90e7c0e9132/FLAGb11093f04 [2021-11-19 14:16:42,798 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:42,798 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-19 14:16:42,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/1bd31dd90/e1e51180a1f84f3cb58dc90e7c0e9132/FLAGb11093f04 [2021-11-19 14:16:42,923 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/data/1bd31dd90/e1e51180a1f84f3cb58dc90e7c0e9132 [2021-11-19 14:16:42,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:42,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:42,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:42,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:42,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:42,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:42" (1/1) ... [2021-11-19 14:16:42,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61246ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:42, skipping insertion in model container [2021-11-19 14:16:42,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:42" (1/1) ... [2021-11-19 14:16:42,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:43,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:43,274 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_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-19 14:16:43,888 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:43,906 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:16:43,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:43,936 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_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-19 14:16:44,073 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:44,080 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:44,095 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_3407f032-8544-4db2-a236-d83760ff2ed9/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-19 14:16:44,201 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:44,240 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:44,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44 WrapperNode [2021-11-19 14:16:44,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:44,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:44,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:44,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:44,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,353 INFO L137 Inliner]: procedures = 91, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 760 [2021-11-19 14:16:44,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:44,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:44,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:44,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:44,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:44,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:44,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:44,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:44,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (1/1) ... [2021-11-19 14:16:44,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:44,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:44,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:16:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:16:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:16:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:16:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:16:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:16:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:16:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:16:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:16:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:16:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:16:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:16:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:16:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:16:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:16:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:16:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:16:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:16:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:16:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:16:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:16:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:16:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:16:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:16:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:16:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:16:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:16:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:16:44,643 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:16:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:16:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:16:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:16:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:16:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:16:44,645 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:16:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:16:44,645 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:16:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:16:44,646 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:16:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:16:44,646 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:16:44,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:44,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:44,647 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:16:44,647 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:16:44,829 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:44,832 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:46,237 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:46,264 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:46,264 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:16:46,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:46 BoogieIcfgContainer [2021-11-19 14:16:46,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:46,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:46,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:46,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:46,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:42" (1/3) ... [2021-11-19 14:16:46,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f3073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:46, skipping insertion in model container [2021-11-19 14:16:46,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:44" (2/3) ... [2021-11-19 14:16:46,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f3073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:46, skipping insertion in model container [2021-11-19 14:16:46,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:46" (3/3) ... [2021-11-19 14:16:46,283 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2021-11-19 14:16:46,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:46,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:16:46,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:46,400 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 14:16:46,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:16:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 533 states, 421 states have (on average 1.7125890736342042) internal successors, (721), 442 states have internal predecessors, (721), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:16:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:16:46,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:46,480 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:46,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 702310628, now seen corresponding path program 1 times [2021-11-19 14:16:46,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:46,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352789963] [2021-11-19 14:16:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:46,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:46,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:46,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:16:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:47,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:16:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:16:47,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:16:48,015 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:48,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352789963] [2021-11-19 14:16:48,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352789963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:48,017 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:48,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:16:48,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151373484] [2021-11-19 14:16:48,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:48,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:16:48,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:16:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:16:48,068 INFO L87 Difference]: Start difference. First operand has 533 states, 421 states have (on average 1.7125890736342042) internal successors, (721), 442 states have internal predecessors, (721), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:16:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:48,216 INFO L93 Difference]: Finished difference Result 554 states and 929 transitions. [2021-11-19 14:16:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:16:48,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-19 14:16:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:48,259 INFO L225 Difference]: With dead ends: 554 [2021-11-19 14:16:48,259 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 14:16:48,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 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 14:16:48,269 INFO L933 BasicCegarLoop]: 890 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, 890 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 14:16:48,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 14:16:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 14:16:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7108433734939759) internal successors, (710), 434 states have internal predecessors, (710), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 883 transitions. [2021-11-19 14:16:48,426 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 883 transitions. Word has length 97 [2021-11-19 14:16:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:48,429 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 883 transitions. [2021-11-19 14:16:48,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:16:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 883 transitions. [2021-11-19 14:16:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:16:48,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:48,443 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:48,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:16:48,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:48,665 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -685415757, now seen corresponding path program 1 times [2021-11-19 14:16:48,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:48,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191387629] [2021-11-19 14:16:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:48,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:48,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:48,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:48,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:16:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:49,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:49,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:49,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191387629] [2021-11-19 14:16:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191387629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:49,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:49,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:16:49,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96798313] [2021-11-19 14:16:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:49,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:49,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:49,970 INFO L87 Difference]: Start difference. First operand 525 states and 883 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:50,148 INFO L93 Difference]: Finished difference Result 1041 states and 1758 transitions. [2021-11-19 14:16:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:50,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-19 14:16:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:50,157 INFO L225 Difference]: With dead ends: 1041 [2021-11-19 14:16:50,157 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 14:16:50,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 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 14:16:50,166 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 14 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2600 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 14:16:50,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2600 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 14:16:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 14:16:50,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7084337349397591) internal successors, (709), 434 states have internal predecessors, (709), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 882 transitions. [2021-11-19 14:16:50,229 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 882 transitions. Word has length 99 [2021-11-19 14:16:50,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:50,232 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 882 transitions. [2021-11-19 14:16:50,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 882 transitions. [2021-11-19 14:16:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:16:50,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:50,242 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:50,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:50,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,471 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1110327915, now seen corresponding path program 1 times [2021-11-19 14:16:50,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:50,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104821496] [2021-11-19 14:16:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:50,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:50,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:50,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:16:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:51,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:51,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:51,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104821496] [2021-11-19 14:16:51,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104821496] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:51,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:51,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:16:51,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739956029] [2021-11-19 14:16:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:51,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:51,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:51,571 INFO L87 Difference]: Start difference. First operand 525 states and 882 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:51,695 INFO L93 Difference]: Finished difference Result 1041 states and 1756 transitions. [2021-11-19 14:16:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-19 14:16:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:51,704 INFO L225 Difference]: With dead ends: 1041 [2021-11-19 14:16:51,705 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 14:16:51,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 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 14:16:51,712 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 12 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2600 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 14:16:51,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2600 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 14:16:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 14:16:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 415 states have (on average 1.7060240963855422) internal successors, (708), 434 states have internal predecessors, (708), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 881 transitions. [2021-11-19 14:16:51,778 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 881 transitions. Word has length 101 [2021-11-19 14:16:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:51,779 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 881 transitions. [2021-11-19 14:16:51,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 881 transitions. [2021-11-19 14:16:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:16:51,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:51,787 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:51,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:52,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,011 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1399421363, now seen corresponding path program 1 times [2021-11-19 14:16:52,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:52,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181998079] [2021-11-19 14:16:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:52,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:52,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:52,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:16:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:52,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:52,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181998079] [2021-11-19 14:16:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181998079] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:52,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:52,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:16:52,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187239971] [2021-11-19 14:16:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:52,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:52,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:52,920 INFO L87 Difference]: Start difference. First operand 525 states and 881 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:53,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:53,004 INFO L93 Difference]: Finished difference Result 1045 states and 1759 transitions. [2021-11-19 14:16:53,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:53,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-19 14:16:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:53,011 INFO L225 Difference]: With dead ends: 1045 [2021-11-19 14:16:53,011 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:16:53,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:16:53,016 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 13 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2600 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 14:16:53,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2600 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:16:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:16:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6976190476190476) internal successors, (713), 439 states have internal predecessors, (713), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 886 transitions. [2021-11-19 14:16:53,049 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 886 transitions. Word has length 103 [2021-11-19 14:16:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 886 transitions. [2021-11-19 14:16:53,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 886 transitions. [2021-11-19 14:16:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:16:53,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:53,056 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:53,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:53,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:53,272 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1663492228, now seen corresponding path program 1 times [2021-11-19 14:16:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:53,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010774457] [2021-11-19 14:16:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:53,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:53,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:53,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:16:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:53,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:53,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:53,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:54,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:54,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010774457] [2021-11-19 14:16:54,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010774457] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:54,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:54,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:16:54,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297519590] [2021-11-19 14:16:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:54,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:54,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:54,283 INFO L87 Difference]: Start difference. First operand 531 states and 886 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:54,365 INFO L93 Difference]: Finished difference Result 1044 states and 1750 transitions. [2021-11-19 14:16:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-19 14:16:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:54,372 INFO L225 Difference]: With dead ends: 1044 [2021-11-19 14:16:54,373 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:16:54,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 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 14:16:54,378 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 8 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2601 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 14:16:54,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2601 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:16:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:16:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6952380952380952) internal successors, (712), 439 states have internal predecessors, (712), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 885 transitions. [2021-11-19 14:16:54,410 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 885 transitions. Word has length 104 [2021-11-19 14:16:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:54,411 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 885 transitions. [2021-11-19 14:16:54,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 885 transitions. [2021-11-19 14:16:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:16:54,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:54,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:54,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:54,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 628967127, now seen corresponding path program 1 times [2021-11-19 14:16:54,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:54,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419035593] [2021-11-19 14:16:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:54,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:54,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:54,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:54,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:16:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:55,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:55,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:55,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419035593] [2021-11-19 14:16:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419035593] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:55,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:55,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:16:55,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239467794] [2021-11-19 14:16:55,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:55,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:55,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:16:55,730 INFO L87 Difference]: Start difference. First operand 531 states and 885 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:55,812 INFO L93 Difference]: Finished difference Result 1044 states and 1749 transitions. [2021-11-19 14:16:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-19 14:16:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:55,820 INFO L225 Difference]: With dead ends: 1044 [2021-11-19 14:16:55,821 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:16:55,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 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 14:16:55,826 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 6 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2601 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 14:16:55,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2601 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:16:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:16:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 420 states have (on average 1.6928571428571428) internal successors, (711), 439 states have internal predecessors, (711), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:16:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 884 transitions. [2021-11-19 14:16:55,863 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 884 transitions. Word has length 105 [2021-11-19 14:16:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:55,863 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 884 transitions. [2021-11-19 14:16:55,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 884 transitions. [2021-11-19 14:16:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:16:55,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:55,869 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:55,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:56,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:56,085 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1434263264, now seen corresponding path program 1 times [2021-11-19 14:16:56,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:56,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741448194] [2021-11-19 14:16:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:56,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:56,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:56,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:56,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:16:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:56,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:16:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:56,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:16:57,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:57,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741448194] [2021-11-19 14:16:57,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741448194] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:57,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:57,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:16:57,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235668056] [2021-11-19 14:16:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:57,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:16:57,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:16:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:16:57,252 INFO L87 Difference]: Start difference. First operand 531 states and 884 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:16:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:57,514 INFO L93 Difference]: Finished difference Result 1061 states and 1777 transitions. [2021-11-19 14:16:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:16:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-19 14:16:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:57,523 INFO L225 Difference]: With dead ends: 1061 [2021-11-19 14:16:57,523 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 14:16:57,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 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 14:16:57,528 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 148 mSDsluCounter, 4233 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5101 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:57,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5101 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:16:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 14:16:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 550. [2021-11-19 14:16:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 436 states have (on average 1.6903669724770642) internal successors, (737), 457 states have internal predecessors, (737), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-11-19 14:16:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 915 transitions. [2021-11-19 14:16:57,567 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 915 transitions. Word has length 106 [2021-11-19 14:16:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:57,567 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 915 transitions. [2021-11-19 14:16:57,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:16:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 915 transitions. [2021-11-19 14:16:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:16:57,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:57,573 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:57,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:57,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1048896481, now seen corresponding path program 1 times [2021-11-19 14:16:57,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:57,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456853513] [2021-11-19 14:16:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:57,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:57,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:16:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:58,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:16:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:58,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:58,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456853513] [2021-11-19 14:16:58,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456853513] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:58,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:58,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:16:58,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807830675] [2021-11-19 14:16:58,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:58,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:58,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:16:58,823 INFO L87 Difference]: Start difference. First operand 550 states and 915 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:58,903 INFO L93 Difference]: Finished difference Result 1074 states and 1799 transitions. [2021-11-19 14:16:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:16:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-19 14:16:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:58,910 INFO L225 Difference]: With dead ends: 1074 [2021-11-19 14:16:58,910 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:16:58,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 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 14:16:58,914 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 8 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2600 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 14:16:58,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2600 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:16:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:16:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:16:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6912442396313363) internal successors, (734), 454 states have internal predecessors, (734), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:16:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 908 transitions. [2021-11-19 14:16:58,966 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 908 transitions. Word has length 106 [2021-11-19 14:16:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:58,967 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 908 transitions. [2021-11-19 14:16:58,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:16:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 908 transitions. [2021-11-19 14:16:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:16:58,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:58,972 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:16:59,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:59,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:59,188 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:59,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:59,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2017589662, now seen corresponding path program 1 times [2021-11-19 14:16:59,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:59,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189655292] [2021-11-19 14:16:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:59,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:59,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:59,192 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:16:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:16:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:59,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:17:00,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:00,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189655292] [2021-11-19 14:17:00,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189655292] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:00,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:00,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:17:00,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401525220] [2021-11-19 14:17:00,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:00,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:00,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:00,186 INFO L87 Difference]: Start difference. First operand 546 states and 908 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:00,443 INFO L93 Difference]: Finished difference Result 1100 states and 1844 transitions. [2021-11-19 14:17:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:17:00,445 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-19 14:17:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:00,454 INFO L225 Difference]: With dead ends: 1100 [2021-11-19 14:17:00,454 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:17:00,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 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 14:17:00,462 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 134 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2408 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:17:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:17:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6797235023041475) internal successors, (729), 454 states have internal predecessors, (729), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:17:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 903 transitions. [2021-11-19 14:17:00,496 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 903 transitions. Word has length 107 [2021-11-19 14:17:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:00,497 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 903 transitions. [2021-11-19 14:17:00,497 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 903 transitions. [2021-11-19 14:17:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:17:00,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:00,503 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:00,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:00,728 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1870807868, now seen corresponding path program 1 times [2021-11-19 14:17:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:00,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573229186] [2021-11-19 14:17:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:00,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:00,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:00,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:00,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:17:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:01,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:17:01,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:01,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573229186] [2021-11-19 14:17:01,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573229186] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:01,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:01,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:17:01,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028405727] [2021-11-19 14:17:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:01,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:01,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:01,842 INFO L87 Difference]: Start difference. First operand 546 states and 903 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:02,079 INFO L93 Difference]: Finished difference Result 1100 states and 1834 transitions. [2021-11-19 14:17:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:17:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-19 14:17:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:02,088 INFO L225 Difference]: With dead ends: 1100 [2021-11-19 14:17:02,088 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:17:02,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 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 14:17:02,093 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 128 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:02,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2408 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:17:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-19 14:17:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 434 states have (on average 1.6682027649769586) internal successors, (724), 454 states have internal predecessors, (724), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:17:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 898 transitions. [2021-11-19 14:17:02,127 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 898 transitions. Word has length 109 [2021-11-19 14:17:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:02,128 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 898 transitions. [2021-11-19 14:17:02,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 898 transitions. [2021-11-19 14:17:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:17:02,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:02,133 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:02,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:02,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:02,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -214859330, now seen corresponding path program 1 times [2021-11-19 14:17:02,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:02,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83553052] [2021-11-19 14:17:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:02,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:02,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:02,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:17:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:03,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:17:03,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:03,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83553052] [2021-11-19 14:17:03,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83553052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:03,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:03,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:17:03,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364270404] [2021-11-19 14:17:03,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:03,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:03,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:03,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:03,492 INFO L87 Difference]: Start difference. First operand 546 states and 898 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:03,724 INFO L93 Difference]: Finished difference Result 1121 states and 1855 transitions. [2021-11-19 14:17:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:17:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-19 14:17:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:03,733 INFO L225 Difference]: With dead ends: 1121 [2021-11-19 14:17:03,733 INFO L226 Difference]: Without dead ends: 576 [2021-11-19 14:17:03,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 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 14:17:03,738 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 143 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:03,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2418 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-19 14:17:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 561. [2021-11-19 14:17:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 449 states have (on average 1.645879732739421) internal successors, (739), 468 states have internal predecessors, (739), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 912 transitions. [2021-11-19 14:17:03,768 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 912 transitions. Word has length 111 [2021-11-19 14:17:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:03,769 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 912 transitions. [2021-11-19 14:17:03,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 912 transitions. [2021-11-19 14:17:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:17:03,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:03,774 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:03,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:03,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:03,999 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -615041730, now seen corresponding path program 1 times [2021-11-19 14:17:04,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:04,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827917646] [2021-11-19 14:17:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:04,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:04,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:04,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:04,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:17:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:04,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:05,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:05,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827917646] [2021-11-19 14:17:05,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827917646] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:05,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:05,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:17:05,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656816926] [2021-11-19 14:17:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:05,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:17:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:17:05,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:05,243 INFO L87 Difference]: Start difference. First operand 561 states and 912 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:05,437 INFO L93 Difference]: Finished difference Result 1085 states and 1776 transitions. [2021-11-19 14:17:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-19 14:17:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:05,446 INFO L225 Difference]: With dead ends: 1085 [2021-11-19 14:17:05,446 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 14:17:05,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:17:05,451 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 131 mSDsluCounter, 4198 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5069 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 14:17:05,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5069 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 14:17:05,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 540. [2021-11-19 14:17:05,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6401869158878504) internal successors, (702), 447 states have internal predecessors, (702), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 875 transitions. [2021-11-19 14:17:05,481 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 875 transitions. Word has length 111 [2021-11-19 14:17:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:05,482 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 875 transitions. [2021-11-19 14:17:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 875 transitions. [2021-11-19 14:17:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:17:05,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:05,487 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:05,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:05,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:05,708 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2068180125, now seen corresponding path program 1 times [2021-11-19 14:17:05,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:05,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088403103] [2021-11-19 14:17:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:05,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:05,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:05,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:05,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:17:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:06,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:17:06,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:06,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088403103] [2021-11-19 14:17:06,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088403103] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:06,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:06,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:17:06,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428754616] [2021-11-19 14:17:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:06,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:06,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:06,875 INFO L87 Difference]: Start difference. First operand 540 states and 875 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:07,012 INFO L93 Difference]: Finished difference Result 1049 states and 1714 transitions. [2021-11-19 14:17:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:17:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-19 14:17:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:07,020 INFO L225 Difference]: With dead ends: 1049 [2021-11-19 14:17:07,021 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:17:07,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 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 14:17:07,028 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 69 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2432 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 14:17:07,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2432 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:17:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 14:17:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6378504672897196) internal successors, (701), 447 states have internal predecessors, (701), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 874 transitions. [2021-11-19 14:17:07,060 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 874 transitions. Word has length 112 [2021-11-19 14:17:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:07,061 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 874 transitions. [2021-11-19 14:17:07,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 874 transitions. [2021-11-19 14:17:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:17:07,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:07,066 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:07,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:07,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:07,281 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1572582777, now seen corresponding path program 1 times [2021-11-19 14:17:07,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:07,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690176704] [2021-11-19 14:17:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:07,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:07,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:07,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:17:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:17:07,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:17:08,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:08,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690176704] [2021-11-19 14:17:08,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690176704] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:08,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:08,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:17:08,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095643924] [2021-11-19 14:17:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:08,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:17:08,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:17:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:08,147 INFO L87 Difference]: Start difference. First operand 540 states and 874 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:08,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:08,263 INFO L93 Difference]: Finished difference Result 1049 states and 1713 transitions. [2021-11-19 14:17:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:17:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-19 14:17:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:08,291 INFO L225 Difference]: With dead ends: 1049 [2021-11-19 14:17:08,291 INFO L226 Difference]: Without dead ends: 540 [2021-11-19 14:17:08,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 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 14:17:08,295 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 67 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2432 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 14:17:08,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2432 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-19 14:17:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-11-19 14:17:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 428 states have (on average 1.6355140186915889) internal successors, (700), 447 states have internal predecessors, (700), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 873 transitions. [2021-11-19 14:17:08,318 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 873 transitions. Word has length 113 [2021-11-19 14:17:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 873 transitions. [2021-11-19 14:17:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:17:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 873 transitions. [2021-11-19 14:17:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:17:08,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:08,323 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:08,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 838590456, now seen corresponding path program 1 times [2021-11-19 14:17:08,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:08,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865739168] [2021-11-19 14:17:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:08,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:08,539 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:08,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:17:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:17:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:09,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:09,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:09,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865739168] [2021-11-19 14:17:09,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865739168] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:09,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:09,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:17:09,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554654167] [2021-11-19 14:17:09,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:09,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:09,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:09,700 INFO L87 Difference]: Start difference. First operand 540 states and 873 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:09,969 INFO L93 Difference]: Finished difference Result 1054 states and 1720 transitions. [2021-11-19 14:17:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-19 14:17:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:09,977 INFO L225 Difference]: With dead ends: 1054 [2021-11-19 14:17:09,977 INFO L226 Difference]: Without dead ends: 551 [2021-11-19 14:17:09,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 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 14:17:09,983 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 109 mSDsluCounter, 4826 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5641 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 14:17:09,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5641 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-19 14:17:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 542. [2021-11-19 14:17:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 430 states have (on average 1.630232558139535) internal successors, (701), 449 states have internal predecessors, (701), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 874 transitions. [2021-11-19 14:17:10,060 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 874 transitions. Word has length 114 [2021-11-19 14:17:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:10,061 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 874 transitions. [2021-11-19 14:17:10,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 874 transitions. [2021-11-19 14:17:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:17:10,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:10,065 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:10,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:10,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,284 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash -58596764, now seen corresponding path program 1 times [2021-11-19 14:17:10,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:10,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321755525] [2021-11-19 14:17:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:10,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:10,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:10,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:17:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:11,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:11,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:11,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321755525] [2021-11-19 14:17:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321755525] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:11,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:17:11,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:17:11,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751388826] [2021-11-19 14:17:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:11,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:11,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:11,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:11,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:11,478 INFO L87 Difference]: Start difference. First operand 542 states and 874 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:11,753 INFO L93 Difference]: Finished difference Result 1046 states and 1701 transitions. [2021-11-19 14:17:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-19 14:17:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:11,759 INFO L225 Difference]: With dead ends: 1046 [2021-11-19 14:17:11,760 INFO L226 Difference]: Without dead ends: 547 [2021-11-19 14:17:11,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 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 14:17:11,764 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 77 mSDsluCounter, 4832 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5649 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 14:17:11,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5649 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-19 14:17:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 544. [2021-11-19 14:17:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 432 states have (on average 1.625) internal successors, (702), 451 states have internal predecessors, (702), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 875 transitions. [2021-11-19 14:17:11,795 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 875 transitions. Word has length 115 [2021-11-19 14:17:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:11,795 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 875 transitions. [2021-11-19 14:17:11,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:17:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 875 transitions. [2021-11-19 14:17:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:17:11,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:11,800 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:11,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:12,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:12,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1849659454, now seen corresponding path program 1 times [2021-11-19 14:17:12,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:12,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716917839] [2021-11-19 14:17:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:12,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:12,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:12,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:12,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:17:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:12,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:12,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:13,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:13,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716917839] [2021-11-19 14:17:13,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716917839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:13,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:13,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:17:13,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798017966] [2021-11-19 14:17:13,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:13,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:17:13,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:17:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:13,274 INFO L87 Difference]: Start difference. First operand 544 states and 875 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:13,549 INFO L93 Difference]: Finished difference Result 992 states and 1628 transitions. [2021-11-19 14:17:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:17:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-19 14:17:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:13,556 INFO L225 Difference]: With dead ends: 992 [2021-11-19 14:17:13,556 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:17:13,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 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 14:17:13,562 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 55 mSDsluCounter, 7337 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8166 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 8166 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:17:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:17:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6329411764705883) internal successors, (694), 444 states have internal predecessors, (694), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 867 transitions. [2021-11-19 14:17:13,590 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 867 transitions. Word has length 116 [2021-11-19 14:17:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:13,590 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 867 transitions. [2021-11-19 14:17:13,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 867 transitions. [2021-11-19 14:17:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:17:13,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:13,596 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:13,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:13,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:13,818 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1632526870, now seen corresponding path program 1 times [2021-11-19 14:17:13,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:13,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912862041] [2021-11-19 14:17:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:13,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:13,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:13,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:17:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:14,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:14,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:15,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:15,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912862041] [2021-11-19 14:17:15,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912862041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:15,075 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:15,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:17:15,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55326581] [2021-11-19 14:17:15,076 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:15,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:17:15,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:15,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:17:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:15,082 INFO L87 Difference]: Start difference. First operand 537 states and 867 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:15,319 INFO L93 Difference]: Finished difference Result 997 states and 1642 transitions. [2021-11-19 14:17:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:15,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-19 14:17:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:15,327 INFO L225 Difference]: With dead ends: 997 [2021-11-19 14:17:15,327 INFO L226 Difference]: Without dead ends: 534 [2021-11-19 14:17:15,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 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 14:17:15,332 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 98 mSDsluCounter, 6463 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 7284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:15,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 7284 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-19 14:17:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2021-11-19 14:17:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 422 states have (on average 1.632701421800948) internal successors, (689), 441 states have internal predecessors, (689), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 862 transitions. [2021-11-19 14:17:15,359 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 862 transitions. Word has length 117 [2021-11-19 14:17:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:15,359 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 862 transitions. [2021-11-19 14:17:15,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 862 transitions. [2021-11-19 14:17:15,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:17:15,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:15,365 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:15,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:15,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -294323606, now seen corresponding path program 1 times [2021-11-19 14:17:15,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:15,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800890356] [2021-11-19 14:17:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:15,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:15,586 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:15,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:17:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:17:15,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:16,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:16,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:16,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800890356] [2021-11-19 14:17:16,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800890356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:16,609 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:16,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:17:16,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161160296] [2021-11-19 14:17:16,609 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:16,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:17:16,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:17:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:17:16,611 INFO L87 Difference]: Start difference. First operand 534 states and 862 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:17:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:16,787 INFO L93 Difference]: Finished difference Result 994 states and 1637 transitions. [2021-11-19 14:17:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:16,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-19 14:17:16,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:16,794 INFO L225 Difference]: With dead ends: 994 [2021-11-19 14:17:16,795 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:17:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 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 14:17:16,799 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 142 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 4857 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 14:17:16,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 4857 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:17:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-19 14:17:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 414 states have (on average 1.6376811594202898) internal successors, (678), 433 states have internal predecessors, (678), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 851 transitions. [2021-11-19 14:17:16,857 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 851 transitions. Word has length 117 [2021-11-19 14:17:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:16,858 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 851 transitions. [2021-11-19 14:17:16,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:17:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 851 transitions. [2021-11-19 14:17:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:17:16,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:16,863 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:16,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:17,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:17,076 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1988689946, now seen corresponding path program 1 times [2021-11-19 14:17:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:17,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10033340] [2021-11-19 14:17:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:17,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:17,079 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:17,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:17:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:17:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:17,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:18,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:18,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10033340] [2021-11-19 14:17:18,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10033340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:18,309 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:18,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:18,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540641627] [2021-11-19 14:17:18,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:18,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:18,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:18,311 INFO L87 Difference]: Start difference. First operand 526 states and 851 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:18,598 INFO L93 Difference]: Finished difference Result 980 states and 1615 transitions. [2021-11-19 14:17:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-19 14:17:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:18,606 INFO L225 Difference]: With dead ends: 980 [2021-11-19 14:17:18,606 INFO L226 Difference]: Without dead ends: 526 [2021-11-19 14:17:18,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 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 14:17:18,611 INFO L933 BasicCegarLoop]: 816 mSDtfsCounter, 67 mSDsluCounter, 8005 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 8821 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:18,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 8821 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-19 14:17:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-19 14:17:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 414 states have (on average 1.6352657004830917) internal successors, (677), 433 states have internal predecessors, (677), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 850 transitions. [2021-11-19 14:17:18,645 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 850 transitions. Word has length 118 [2021-11-19 14:17:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 850 transitions. [2021-11-19 14:17:18,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 850 transitions. [2021-11-19 14:17:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:17:18,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:18,651 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:18,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:18,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:18,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash -489065112, now seen corresponding path program 1 times [2021-11-19 14:17:18,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:18,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527747611] [2021-11-19 14:17:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:18,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:18,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:17:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:19,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:17:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:19,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:20,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:20,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527747611] [2021-11-19 14:17:20,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527747611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:20,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:20,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:20,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010287936] [2021-11-19 14:17:20,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:20,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:20,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:20,203 INFO L87 Difference]: Start difference. First operand 526 states and 850 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:20,450 INFO L93 Difference]: Finished difference Result 1024 states and 1672 transitions. [2021-11-19 14:17:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-19 14:17:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:20,454 INFO L225 Difference]: With dead ends: 1024 [2021-11-19 14:17:20,454 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 14:17:20,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 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 14:17:20,458 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 144 mSDsluCounter, 6369 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 7173 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:20,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 7173 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 14:17:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-19 14:17:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 411 states have (on average 1.6277372262773722) internal successors, (669), 430 states have internal predecessors, (669), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 842 transitions. [2021-11-19 14:17:20,483 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 842 transitions. Word has length 119 [2021-11-19 14:17:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:20,484 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 842 transitions. [2021-11-19 14:17:20,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 842 transitions. [2021-11-19 14:17:20,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:17:20,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:20,489 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:20,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:20,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:20,704 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1906957611, now seen corresponding path program 1 times [2021-11-19 14:17:20,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:20,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273230846] [2021-11-19 14:17:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:20,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:20,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:20,706 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:20,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:17:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:21,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:21,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:21,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273230846] [2021-11-19 14:17:21,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273230846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:21,870 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:21,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:21,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921764340] [2021-11-19 14:17:21,871 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:21,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:21,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:21,872 INFO L87 Difference]: Start difference. First operand 523 states and 842 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:22,086 INFO L93 Difference]: Finished difference Result 971 states and 1595 transitions. [2021-11-19 14:17:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-19 14:17:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:22,096 INFO L225 Difference]: With dead ends: 971 [2021-11-19 14:17:22,097 INFO L226 Difference]: Without dead ends: 523 [2021-11-19 14:17:22,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 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 14:17:22,100 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 68 mSDsluCounter, 7175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7980 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 14:17:22,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7980 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:17:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-19 14:17:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-19 14:17:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 411 states have (on average 1.6253041362530414) internal successors, (668), 430 states have internal predecessors, (668), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 841 transitions. [2021-11-19 14:17:22,122 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 841 transitions. Word has length 120 [2021-11-19 14:17:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 841 transitions. [2021-11-19 14:17:22,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 841 transitions. [2021-11-19 14:17:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:17:22,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:22,127 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:22,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:22,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:22,348 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1418850503, now seen corresponding path program 1 times [2021-11-19 14:17:22,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:22,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547731823] [2021-11-19 14:17:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:22,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:22,351 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:22,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:17:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:22,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:17:23,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:23,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547731823] [2021-11-19 14:17:23,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547731823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:23,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:23,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:17:23,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510723350] [2021-11-19 14:17:23,472 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:23,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:17:23,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:17:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:17:23,474 INFO L87 Difference]: Start difference. First operand 523 states and 841 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:23,733 INFO L93 Difference]: Finished difference Result 1009 states and 1640 transitions. [2021-11-19 14:17:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-19 14:17:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:23,739 INFO L225 Difference]: With dead ends: 1009 [2021-11-19 14:17:23,739 INFO L226 Difference]: Without dead ends: 520 [2021-11-19 14:17:23,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 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 14:17:23,743 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 113 mSDsluCounter, 5563 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:23,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6366 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-19 14:17:23,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2021-11-19 14:17:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 408 states have (on average 1.6176470588235294) internal successors, (660), 427 states have internal predecessors, (660), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:17:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 833 transitions. [2021-11-19 14:17:23,764 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 833 transitions. Word has length 121 [2021-11-19 14:17:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:23,764 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 833 transitions. [2021-11-19 14:17:23,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:17:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 833 transitions. [2021-11-19 14:17:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:17:23,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:23,769 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:23,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:23,989 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2027276592, now seen corresponding path program 1 times [2021-11-19 14:17:23,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:23,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127831497] [2021-11-19 14:17:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:23,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:23,991 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:23,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:17:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:17:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:24,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:25,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:25,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127831497] [2021-11-19 14:17:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127831497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:25,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:25,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:17:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387994603] [2021-11-19 14:17:25,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:17:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:17:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:17:25,680 INFO L87 Difference]: Start difference. First operand 520 states and 833 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:17:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:30,499 INFO L93 Difference]: Finished difference Result 1097 states and 1830 transitions. [2021-11-19 14:17:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:17:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-19 14:17:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:30,505 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 14:17:30,506 INFO L226 Difference]: Without dead ends: 657 [2021-11-19 14:17:30,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:17:30,510 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 1418 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 4903 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 4017 SdHoareTripleChecker+Invalid, 5442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 4903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:30,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1418 Valid, 4017 Invalid, 5442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 4903 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:17:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-19 14:17:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-11-19 14:17:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 411 states have (on average 1.6131386861313868) internal successors, (663), 430 states have internal predecessors, (663), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (100), 83 states have call predecessors, (100), 84 states have call successors, (100) [2021-11-19 14:17:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 852 transitions. [2021-11-19 14:17:30,547 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 852 transitions. Word has length 122 [2021-11-19 14:17:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:30,548 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 852 transitions. [2021-11-19 14:17:30,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:17:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 852 transitions. [2021-11-19 14:17:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:30,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:30,553 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:30,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 14:17:30,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:30,768 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 787134917, now seen corresponding path program 1 times [2021-11-19 14:17:30,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:30,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747934468] [2021-11-19 14:17:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:30,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:30,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:30,771 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:30,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:17:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:31,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:32,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:32,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747934468] [2021-11-19 14:17:32,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747934468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:32,097 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:32,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:17:32,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526721163] [2021-11-19 14:17:32,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:32,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:17:32,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:17:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:17:32,100 INFO L87 Difference]: Start difference. First operand 524 states and 852 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:17:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:37,401 INFO L93 Difference]: Finished difference Result 1813 states and 3107 transitions. [2021-11-19 14:17:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:17:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-19 14:17:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:37,413 INFO L225 Difference]: With dead ends: 1813 [2021-11-19 14:17:37,413 INFO L226 Difference]: Without dead ends: 1369 [2021-11-19 14:17:37,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:17:37,418 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 3840 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 3626 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3913 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 4740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 3626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:37,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3913 Valid, 3068 Invalid, 4740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 3626 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 14:17:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-19 14:17:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1281. [2021-11-19 14:17:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 999 states have (on average 1.6496496496496496) internal successors, (1648), 1047 states have internal predecessors, (1648), 226 states have call successors, (226), 54 states have call predecessors, (226), 55 states have return successors, (244), 216 states have call predecessors, (244), 221 states have call successors, (244) [2021-11-19 14:17:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2118 transitions. [2021-11-19 14:17:37,529 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2118 transitions. Word has length 123 [2021-11-19 14:17:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:37,529 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 2118 transitions. [2021-11-19 14:17:37,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:17:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2118 transitions. [2021-11-19 14:17:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:17:37,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:37,533 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:37,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:37,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:37,748 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1035670321, now seen corresponding path program 1 times [2021-11-19 14:17:37,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:37,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268237055] [2021-11-19 14:17:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:37,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:37,751 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:37,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:17:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:17:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:38,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:39,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:39,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268237055] [2021-11-19 14:17:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268237055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:39,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:39,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 14:17:39,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357712974] [2021-11-19 14:17:39,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:39,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:17:39,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:39,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:17:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:17:39,079 INFO L87 Difference]: Start difference. First operand 1281 states and 2118 transitions. Second operand has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:17:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:48,842 INFO L93 Difference]: Finished difference Result 6541 states and 11380 transitions. [2021-11-19 14:17:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:17:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 125 [2021-11-19 14:17:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:48,899 INFO L225 Difference]: With dead ends: 6541 [2021-11-19 14:17:48,899 INFO L226 Difference]: Without dead ends: 5340 [2021-11-19 14:17:48,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:17:48,915 INFO L933 BasicCegarLoop]: 1721 mSDtfsCounter, 3879 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 7386 mSolverCounterSat, 1849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3974 SdHoareTripleChecker+Valid, 5070 SdHoareTripleChecker+Invalid, 9235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1849 IncrementalHoareTripleChecker+Valid, 7386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:48,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3974 Valid, 5070 Invalid, 9235 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1849 Valid, 7386 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-19 14:17:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-11-19 14:17:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 3021. [2021-11-19 14:17:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2242 states have (on average 1.6436217662801071) internal successors, (3685), 2388 states have internal predecessors, (3685), 665 states have call successors, (665), 100 states have call predecessors, (665), 113 states have return successors, (760), 654 states have call predecessors, (760), 660 states have call successors, (760) [2021-11-19 14:17:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5110 transitions. [2021-11-19 14:17:49,348 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5110 transitions. Word has length 125 [2021-11-19 14:17:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:49,349 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 5110 transitions. [2021-11-19 14:17:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.833333333333334) internal successors, (166), 12 states have internal predecessors, (166), 7 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:17:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5110 transitions. [2021-11-19 14:17:49,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:17:49,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:49,353 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:17:49,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:49,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:49,568 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1413929809, now seen corresponding path program 1 times [2021-11-19 14:17:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:49,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825192385] [2021-11-19 14:17:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:49,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:49,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:49,570 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:17:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:49,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:17:49,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:50,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:50,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825192385] [2021-11-19 14:17:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825192385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:50,903 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:50,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:17:50,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134625779] [2021-11-19 14:17:50,903 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:17:50,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:17:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:17:50,905 INFO L87 Difference]: Start difference. First operand 3021 states and 5110 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:17:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:55,339 INFO L93 Difference]: Finished difference Result 8107 states and 13882 transitions. [2021-11-19 14:17:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:17:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-19 14:17:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:55,418 INFO L225 Difference]: With dead ends: 8107 [2021-11-19 14:17:55,418 INFO L226 Difference]: Without dead ends: 5959 [2021-11-19 14:17:55,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:17:55,439 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 2674 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 3072 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 2449 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:55,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 2449 Invalid, 3675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3072 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 14:17:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2021-11-19 14:17:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5568. [2021-11-19 14:17:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5568 states, 4153 states have (on average 1.6465205875270887) internal successors, (6838), 4426 states have internal predecessors, (6838), 1185 states have call successors, (1185), 180 states have call predecessors, (1185), 229 states have return successors, (1459), 1165 states have call predecessors, (1459), 1180 states have call successors, (1459) [2021-11-19 14:17:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5568 states to 5568 states and 9482 transitions. [2021-11-19 14:17:56,031 INFO L78 Accepts]: Start accepts. Automaton has 5568 states and 9482 transitions. Word has length 125 [2021-11-19 14:17:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:56,031 INFO L470 AbstractCegarLoop]: Abstraction has 5568 states and 9482 transitions. [2021-11-19 14:17:56,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:17:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5568 states and 9482 transitions. [2021-11-19 14:17:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:17:56,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:56,033 INFO L514 BasicCegarLoop]: trace histogram [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 14:17:56,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:56,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:17:56,236 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:56,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash 929290465, now seen corresponding path program 1 times [2021-11-19 14:17:56,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:17:56,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369635507] [2021-11-19 14:17:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:56,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:17:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:17:56,239 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:17:56,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:17:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:17:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:57,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:17:58,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:17:58,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369635507] [2021-11-19 14:17:58,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369635507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:58,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:58,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:17:58,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982577177] [2021-11-19 14:17:58,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:58,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:17:58,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:17:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:17:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:17:58,061 INFO L87 Difference]: Start difference. First operand 5568 states and 9482 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 14:18:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:06,396 INFO L93 Difference]: Finished difference Result 14991 states and 25644 transitions. [2021-11-19 14:18:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:18:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-19 14:18:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:06,478 INFO L225 Difference]: With dead ends: 14991 [2021-11-19 14:18:06,478 INFO L226 Difference]: Without dead ends: 10196 [2021-11-19 14:18:06,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:18:06,506 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 3282 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 6746 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 7580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 6746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:06,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3354 Valid, 3764 Invalid, 7580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 6746 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-19 14:18:06,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10196 states. [2021-11-19 14:18:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10196 to 9902. [2021-11-19 14:18:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 7357 states have (on average 1.637624031534593) internal successors, (12048), 7838 states have internal predecessors, (12048), 2125 states have call successors, (2125), 330 states have call predecessors, (2125), 419 states have return successors, (2633), 2093 states have call predecessors, (2633), 2120 states have call successors, (2633) [2021-11-19 14:18:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 16806 transitions. [2021-11-19 14:18:07,529 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 16806 transitions. Word has length 130 [2021-11-19 14:18:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:07,530 INFO L470 AbstractCegarLoop]: Abstraction has 9902 states and 16806 transitions. [2021-11-19 14:18:07,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 14:18:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 16806 transitions. [2021-11-19 14:18:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:18:07,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:07,534 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:18:07,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:07,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:07,748 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1026998805, now seen corresponding path program 1 times [2021-11-19 14:18:07,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:07,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932557410] [2021-11-19 14:18:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:07,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:07,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:07,753 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:07,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:18:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:18:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:18:08,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:18:09,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:09,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932557410] [2021-11-19 14:18:09,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932557410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:09,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:09,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:18:09,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761852428] [2021-11-19 14:18:09,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:18:09,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:18:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:18:09,179 INFO L87 Difference]: Start difference. First operand 9902 states and 16806 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:18:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:09,932 INFO L93 Difference]: Finished difference Result 19563 states and 33468 transitions. [2021-11-19 14:18:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:18:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-19 14:18:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:10,021 INFO L225 Difference]: With dead ends: 19563 [2021-11-19 14:18:10,021 INFO L226 Difference]: Without dead ends: 9902 [2021-11-19 14:18:10,063 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 14:18:10,064 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 234 mSDsluCounter, 2900 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3752 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:10,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3752 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:18:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9902 states. [2021-11-19 14:18:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9902 to 9902. [2021-11-19 14:18:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9902 states, 7357 states have (on average 1.6207693353268995) internal successors, (11924), 7838 states have internal predecessors, (11924), 2125 states have call successors, (2125), 330 states have call predecessors, (2125), 419 states have return successors, (2633), 2093 states have call predecessors, (2633), 2120 states have call successors, (2633) [2021-11-19 14:18:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9902 states to 9902 states and 16682 transitions. [2021-11-19 14:18:10,987 INFO L78 Accepts]: Start accepts. Automaton has 9902 states and 16682 transitions. Word has length 137 [2021-11-19 14:18:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 9902 states and 16682 transitions. [2021-11-19 14:18:10,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:18:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9902 states and 16682 transitions. [2021-11-19 14:18:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:18:10,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:10,993 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:18:11,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:11,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:11,208 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash -866797828, now seen corresponding path program 1 times [2021-11-19 14:18:11,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:11,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022887850] [2021-11-19 14:18:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:11,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:11,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:11,212 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:11,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:18:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:18:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:18:12,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:18:12,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:12,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022887850] [2021-11-19 14:18:12,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022887850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:12,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:12,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:18:12,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142992720] [2021-11-19 14:18:12,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:12,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:18:12,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:18:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:18:12,738 INFO L87 Difference]: Start difference. First operand 9902 states and 16682 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:18:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:16,567 INFO L93 Difference]: Finished difference Result 19693 states and 33244 transitions. [2021-11-19 14:18:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:18:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-19 14:18:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:16,652 INFO L225 Difference]: With dead ends: 19693 [2021-11-19 14:18:16,652 INFO L226 Difference]: Without dead ends: 10777 [2021-11-19 14:18:16,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:18:16,688 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 2619 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 3852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:16,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 2292 Invalid, 3852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:18:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10777 states. [2021-11-19 14:18:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10777 to 10262. [2021-11-19 14:18:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10262 states, 7629 states have (on average 1.610696028313016) internal successors, (12288), 8130 states have internal predecessors, (12288), 2163 states have call successors, (2163), 362 states have call predecessors, (2163), 469 states have return successors, (2719), 2129 states have call predecessors, (2719), 2158 states have call successors, (2719) [2021-11-19 14:18:17,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10262 states to 10262 states and 17170 transitions. [2021-11-19 14:18:17,459 INFO L78 Accepts]: Start accepts. Automaton has 10262 states and 17170 transitions. Word has length 142 [2021-11-19 14:18:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:17,460 INFO L470 AbstractCegarLoop]: Abstraction has 10262 states and 17170 transitions. [2021-11-19 14:18:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:18:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10262 states and 17170 transitions. [2021-11-19 14:18:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:18:17,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:17,465 INFO L514 BasicCegarLoop]: trace histogram [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 14:18:17,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-19 14:18:17,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:17,680 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash 95028448, now seen corresponding path program 1 times [2021-11-19 14:18:17,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:17,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433983945] [2021-11-19 14:18:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:17,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:17,683 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:17,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:18:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:18:18,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:18:18,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:18:19,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:19,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433983945] [2021-11-19 14:18:19,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433983945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:19,509 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:18:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218806985] [2021-11-19 14:18:19,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:19,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:18:19,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:18:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:18:19,511 INFO L87 Difference]: Start difference. First operand 10262 states and 17170 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:18:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:27,324 INFO L93 Difference]: Finished difference Result 26062 states and 44260 transitions. [2021-11-19 14:18:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:18:27,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-19 14:18:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:27,455 INFO L225 Difference]: With dead ends: 26062 [2021-11-19 14:18:27,455 INFO L226 Difference]: Without dead ends: 15580 [2021-11-19 14:18:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:18:27,515 INFO L933 BasicCegarLoop]: 1069 mSDtfsCounter, 2676 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 6107 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2767 SdHoareTripleChecker+Valid, 4201 SdHoareTripleChecker+Invalid, 6816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 6107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:27,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2767 Valid, 4201 Invalid, 6816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 6107 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-19 14:18:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15580 states. [2021-11-19 14:18:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15580 to 14796. [2021-11-19 14:18:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14796 states, 10979 states have (on average 1.6057928773112304) internal successors, (17630), 11737 states have internal predecessors, (17630), 3149 states have call successors, (3149), 535 states have call predecessors, (3149), 667 states have return successors, (4053), 3043 states have call predecessors, (4053), 3144 states have call successors, (4053) [2021-11-19 14:18:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14796 states to 14796 states and 24832 transitions. [2021-11-19 14:18:28,709 INFO L78 Accepts]: Start accepts. Automaton has 14796 states and 24832 transitions. Word has length 147 [2021-11-19 14:18:28,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:28,710 INFO L470 AbstractCegarLoop]: Abstraction has 14796 states and 24832 transitions. [2021-11-19 14:18:28,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:18:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14796 states and 24832 transitions. [2021-11-19 14:18:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:18:28,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:28,715 INFO L514 BasicCegarLoop]: trace histogram [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 14:18:28,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:18:28,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:28,932 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1576396380, now seen corresponding path program 1 times [2021-11-19 14:18:28,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:28,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000272687] [2021-11-19 14:18:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:28,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:28,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:28,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:18:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:18:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:18:29,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:18:30,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:30,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000272687] [2021-11-19 14:18:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000272687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:18:30,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:18:30,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:18:30,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421220207] [2021-11-19 14:18:30,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:18:30,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:18:30,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:18:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:18:30,657 INFO L87 Difference]: Start difference. First operand 14796 states and 24832 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:18:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:39,989 INFO L93 Difference]: Finished difference Result 40062 states and 67900 transitions. [2021-11-19 14:18:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:18:39,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-19 14:18:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:40,355 INFO L225 Difference]: With dead ends: 40062 [2021-11-19 14:18:40,355 INFO L226 Difference]: Without dead ends: 26257 [2021-11-19 14:18:40,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 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 14:18:40,429 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 2668 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 7944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:40,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 3865 Invalid, 7944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2021-11-19 14:18:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26257 states. [2021-11-19 14:18:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26257 to 26159. [2021-11-19 14:18:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26159 states, 19330 states have (on average 1.6166063114330056) internal successors, (31249), 20657 states have internal predecessors, (31249), 5729 states have call successors, (5729), 967 states have call predecessors, (5729), 1099 states have return successors, (7046), 5534 states have call predecessors, (7046), 5724 states have call successors, (7046) [2021-11-19 14:18:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26159 states to 26159 states and 44024 transitions. [2021-11-19 14:18:42,762 INFO L78 Accepts]: Start accepts. Automaton has 26159 states and 44024 transitions. Word has length 147 [2021-11-19 14:18:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:18:42,763 INFO L470 AbstractCegarLoop]: Abstraction has 26159 states and 44024 transitions. [2021-11-19 14:18:42,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:18:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 26159 states and 44024 transitions. [2021-11-19 14:18:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:18:42,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:18:42,769 INFO L514 BasicCegarLoop]: trace histogram [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 14:18:42,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-19 14:18:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:18:42,970 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:18:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:18:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 851544995, now seen corresponding path program 1 times [2021-11-19 14:18:42,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:18:43,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452883418] [2021-11-19 14:18:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:43,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:18:43,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:18:43,003 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:18:43,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:18:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:18:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:43,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:44,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:18:44,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452883418] [2021-11-19 14:18:44,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452883418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:44,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14242726] [2021-11-19 14:18:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:44,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:18:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:18:44,556 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:18:44,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 14:18:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:18:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:45,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14242726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:45,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061747012] [2021-11-19 14:18:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:18:45,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:18:45,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:18:45,883 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:18:45,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 14:18:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:18:46,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:18:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:18:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:46,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:18:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:18:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061747012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:18:47,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:18:47,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-19 14:18:47,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220466752] [2021-11-19 14:18:47,036 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:18:47,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:18:47,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:18:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:18:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:18:47,041 INFO L87 Difference]: Start difference. First operand 26159 states and 44024 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:18:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:18:57,494 INFO L93 Difference]: Finished difference Result 105222 states and 178342 transitions. [2021-11-19 14:18:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:18:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-19 14:18:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:18:58,368 INFO L225 Difference]: With dead ends: 105222 [2021-11-19 14:18:58,368 INFO L226 Difference]: Without dead ends: 79141 [2021-11-19 14:18:58,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:18:58,508 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 2721 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 4368 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2797 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 5123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 4368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:18:58,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2797 Valid, 2619 Invalid, 5123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 4368 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:18:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79141 states. [2021-11-19 14:19:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79141 to 78743. [2021-11-19 14:19:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78743 states, 58223 states have (on average 1.6122494546828572) internal successors, (93870), 62271 states have internal predecessors, (93870), 17131 states have call successors, (17131), 2903 states have call predecessors, (17131), 3388 states have return successors, (22026), 16568 states have call predecessors, (22026), 17126 states have call successors, (22026) [2021-11-19 14:19:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78743 states to 78743 states and 133027 transitions. [2021-11-19 14:19:05,745 INFO L78 Accepts]: Start accepts. Automaton has 78743 states and 133027 transitions. Word has length 148 [2021-11-19 14:19:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:19:05,745 INFO L470 AbstractCegarLoop]: Abstraction has 78743 states and 133027 transitions. [2021-11-19 14:19:05,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:19:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 78743 states and 133027 transitions. [2021-11-19 14:19:05,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:19:05,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:19:05,748 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:19:05,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-19 14:19:05,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:19:06,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-19 14:19:06,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:19:06,351 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:19:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:19:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1262298978, now seen corresponding path program 1 times [2021-11-19 14:19:06,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:19:06,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245391184] [2021-11-19 14:19:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:19:06,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:19:06,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:19:06,353 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:19:06,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3407f032-8544-4db2-a236-d83760ff2ed9/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:19:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:19:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:19:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:19:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:19:07,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:19:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:19:07,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:19:07,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245391184] [2021-11-19 14:19:07,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245391184] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:19:07,471 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:19:07,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:19:07,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168010278] [2021-11-19 14:19:07,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:19:07,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:19:07,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:19:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:19:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:19:07,473 INFO L87 Difference]: Start difference. First operand 78743 states and 133027 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:19:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:19:18,280 INFO L93 Difference]: Finished difference Result 183455 states and 309853 transitions. [2021-11-19 14:19:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:19:18,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-19 14:19:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:19:19,145 INFO L225 Difference]: With dead ends: 183455 [2021-11-19 14:19:19,145 INFO L226 Difference]: Without dead ends: 107536 [2021-11-19 14:19:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:19:19,426 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 469 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:19:19,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 4349 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:19:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107536 states.