./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:13:59,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:13:59,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:13:59,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:13:59,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:13:59,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:13:59,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:13:59,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:13:59,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:13:59,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:13:59,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:13:59,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:13:59,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:13:59,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:13:59,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:13:59,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:13:59,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:13:59,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:13:59,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:13:59,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:13:59,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:13:59,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:13:59,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:13:59,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:13:59,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:13:59,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:13:59,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:13:59,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:13:59,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:13:59,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:13:59,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:13:59,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:13:59,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:13:59,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:13:59,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:13:59,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:13:59,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:13:59,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:13:59,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:13:59,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:13:59,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:13:59,400 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:13:59,423 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:13:59,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:13:59,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:13:59,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:13:59,426 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:13:59,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:13:59,427 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:13:59,427 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:13:59,428 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:13:59,428 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:13:59,428 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:13:59,429 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:13:59,429 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:13:59,429 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:13:59,430 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:13:59,430 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:13:59,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:13:59,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:13:59,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:13:59,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:13:59,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:13:59,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:13:59,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:13:59,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:13:59,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:13:59,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:13:59,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:13:59,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:13:59,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:13:59,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:13:59,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:13:59,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:13:59,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:13:59,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:13:59,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:13:59,437 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:13:59,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:13:59,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:13:59,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:13:59,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:13:59,438 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-19 14:13:59,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:13:59,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:13:59,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:13:59,714 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:13:59,715 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:13:59,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-19 14:13:59,803 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/f0e434e5f/b9a06f5d42094488b8040f72885b0683/FLAGcb3a6ca5e [2021-11-19 14:14:00,508 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:00,509 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-19 14:14:00,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/f0e434e5f/b9a06f5d42094488b8040f72885b0683/FLAGcb3a6ca5e [2021-11-19 14:14:00,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/f0e434e5f/b9a06f5d42094488b8040f72885b0683 [2021-11-19 14:14:00,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:00,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:00,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:00,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:00,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:00,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:00" (1/1) ... [2021-11-19 14:14:00,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76220f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:00, skipping insertion in model container [2021-11-19 14:14:00,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:00" (1/1) ... [2021-11-19 14:14:00,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:00,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:01,270 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-19 14:14:01,403 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:01,414 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 14:14:01,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@196a2840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:01, skipping insertion in model container [2021-11-19 14:14:01,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:01,416 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:01,418 INFO L158 Benchmark]: Toolchain (without parser) took 725.27ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 58.0MB in the beginning and 75.0MB in the end (delta: -17.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:01,419 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 47.3MB in the beginning and 47.2MB in the end (delta: 44.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:01,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 719.69ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.8MB in the beginning and 75.0MB in the end (delta: -17.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:14:01,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 47.3MB in the beginning and 47.2MB in the end (delta: 44.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 719.69ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.8MB in the beginning and 75.0MB in the end (delta: -17.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3004]: 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:03,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:03,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:03,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:03,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:03,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:03,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:03,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:03,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:03,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:03,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:03,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:03,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:03,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:03,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:03,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:03,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:03,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:03,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:03,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:03,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:03,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:03,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:03,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:03,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:03,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:03,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:03,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:03,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:03,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:03,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:03,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:03,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:03,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:03,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:03,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:03,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:03,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:03,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:03,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:03,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:03,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:03,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:03,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:03,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:03,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:03,931 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:03,931 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:03,931 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:03,932 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:03,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:03,933 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:03,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:03,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:03,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:03,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:03,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:03,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:03,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:03,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:03,937 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:03,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:03,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:03,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:03,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:03,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:03,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:03,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:03,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:03,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:03,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:03,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:03,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:03,940 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:03,941 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:03,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:03,941 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:03,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:03,942 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-19 14:14:04,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:04,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:04,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:04,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:04,360 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:04,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-19 14:14:04,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/91fd4f44e/4e7b8c10ce1a4fe0900a9aa976ddf3a4/FLAG8b7c13de1 [2021-11-19 14:14:05,140 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:05,143 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-19 14:14:05,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/91fd4f44e/4e7b8c10ce1a4fe0900a9aa976ddf3a4/FLAG8b7c13de1 [2021-11-19 14:14:05,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/data/91fd4f44e/4e7b8c10ce1a4fe0900a9aa976ddf3a4 [2021-11-19 14:14:05,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:05,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:05,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:05,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:05,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:05,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b4effb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:05, skipping insertion in model container [2021-11-19 14:14:05,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:05" (1/1) ... [2021-11-19 14:14:05,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:05,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:05,939 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-19 14:14:06,044 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,060 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:06,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:06,218 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-19 14:14:06,243 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,248 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:06,334 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_dad0bfa0-c851-488b-bc24-cdffa37a86a4/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-19 14:14:06,371 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:06,402 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:06,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06 WrapperNode [2021-11-19 14:14:06,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:06,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:06,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:06,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:06,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,495 INFO L137 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 810 [2021-11-19 14:14:06,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:06,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:06,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:06,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:06,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:06,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:06,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:06,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:06,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (1/1) ... [2021-11-19 14:14:06,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:06,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:06,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:14:06,682 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:14:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:14:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:14:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:14:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:14:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-19 14:14:06,684 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-19 14:14:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:06,684 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:06,684 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:14:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:14:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:14:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:14:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:14:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:14:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:14:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:06,693 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:06,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:06,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:06,694 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:06,695 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:06,900 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:06,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:08,521 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:08,546 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:08,546 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:14:08,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:08 BoogieIcfgContainer [2021-11-19 14:14:08,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:08,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:08,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:08,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:08,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:05" (1/3) ... [2021-11-19 14:14:08,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfbdf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:08, skipping insertion in model container [2021-11-19 14:14:08,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:06" (2/3) ... [2021-11-19 14:14:08,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfbdf06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:08, skipping insertion in model container [2021-11-19 14:14:08,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:08" (3/3) ... [2021-11-19 14:14:08,560 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-11-19 14:14:08,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:08,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:08,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:08,638 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 14:14:08,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-19 14:14:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:14:08,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:08,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:08,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1730037928, now seen corresponding path program 1 times [2021-11-19 14:14:08,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:08,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194312487] [2021-11-19 14:14:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:08,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:08,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:08,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:14:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:09,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:09,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:09,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194312487] [2021-11-19 14:14:09,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194312487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:09,922 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:09,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:14:09,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226350616] [2021-11-19 14:14:09,925 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:14:09,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:14:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:14:09,964 INFO L87 Difference]: Start difference. First operand has 601 states, 474 states have (on average 1.6940928270042195) internal successors, (803), 492 states have internal predecessors, (803), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:10,068 INFO L93 Difference]: Finished difference Result 1180 states and 1989 transitions. [2021-11-19 14:14:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:14:10,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 114 [2021-11-19 14:14:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:10,092 INFO L225 Difference]: With dead ends: 1180 [2021-11-19 14:14:10,092 INFO L226 Difference]: Without dead ends: 591 [2021-11-19 14:14:10,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 226 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 14:14:10,120 INFO L933 BasicCegarLoop]: 991 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, 991 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 14:14:10,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-19 14:14:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2021-11-19 14:14:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 467 states have (on average 1.676659528907923) internal successors, (783), 483 states have internal predecessors, (783), 100 states have call successors, (100), 25 states have call predecessors, (100), 23 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:14:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 980 transitions. [2021-11-19 14:14:10,303 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 980 transitions. Word has length 114 [2021-11-19 14:14:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:10,308 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 980 transitions. [2021-11-19 14:14:10,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:14:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 980 transitions. [2021-11-19 14:14:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:14:10,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:10,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:10,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:10,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,535 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -923073288, now seen corresponding path program 1 times [2021-11-19 14:14:10,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:10,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551956923] [2021-11-19 14:14:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:10,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:10,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:10,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:14:11,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:11,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:11,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551956923] [2021-11-19 14:14:11,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551956923] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:11,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:11,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:11,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832991074] [2021-11-19 14:14:11,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:11,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:11,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:11,497 INFO L87 Difference]: Start difference. First operand 591 states and 980 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:11,611 INFO L93 Difference]: Finished difference Result 1178 states and 1960 transitions. [2021-11-19 14:14:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:11,612 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2021-11-19 14:14:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:11,618 INFO L225 Difference]: With dead ends: 1178 [2021-11-19 14:14:11,618 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 14:14:11,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 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 14:14:11,624 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 15 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:11,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2886 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 14:14:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-19 14:14:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 470 states have (on average 1.672340425531915) internal successors, (786), 486 states have internal predecessors, (786), 100 states have call successors, (100), 26 states have call predecessors, (100), 24 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:14:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 983 transitions. [2021-11-19 14:14:11,661 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 983 transitions. Word has length 114 [2021-11-19 14:14:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 983 transitions. [2021-11-19 14:14:11,662 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 983 transitions. [2021-11-19 14:14:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:14:11,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:11,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:11,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:11,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:11,883 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1003991098, now seen corresponding path program 1 times [2021-11-19 14:14:11,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:11,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230006187] [2021-11-19 14:14:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:11,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:11,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:11,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:12,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:12,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:12,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230006187] [2021-11-19 14:14:12,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230006187] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:12,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:12,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:14:12,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460675914] [2021-11-19 14:14:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:12,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:12,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:12,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:12,932 INFO L87 Difference]: Start difference. First operand 595 states and 983 transitions. Second operand has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:13,241 INFO L93 Difference]: Finished difference Result 1202 states and 1991 transitions. [2021-11-19 14:14:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2021-11-19 14:14:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:13,250 INFO L225 Difference]: With dead ends: 1202 [2021-11-19 14:14:13,250 INFO L226 Difference]: Without dead ends: 617 [2021-11-19 14:14:13,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 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 14:14:13,259 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 119 mSDsluCounter, 4767 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5742 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:13,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 5742 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-19 14:14:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 608. [2021-11-19 14:14:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 480 states have (on average 1.66875) internal successors, (801), 498 states have internal predecessors, (801), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-19 14:14:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1005 transitions. [2021-11-19 14:14:13,313 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1005 transitions. Word has length 116 [2021-11-19 14:14:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:13,314 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1005 transitions. [2021-11-19 14:14:13,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1005 transitions. [2021-11-19 14:14:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:13,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:13,321 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] [2021-11-19 14:14:13,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,535 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1811840057, now seen corresponding path program 1 times [2021-11-19 14:14:13,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:13,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266001016] [2021-11-19 14:14:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:13,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:13,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:13,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:13,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:13,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:14,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:14,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:14,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266001016] [2021-11-19 14:14:14,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266001016] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:14,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:14,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:14:14,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782529254] [2021-11-19 14:14:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:14,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:14,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:14,618 INFO L87 Difference]: Start difference. First operand 608 states and 1005 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:14,982 INFO L93 Difference]: Finished difference Result 1222 states and 2024 transitions. [2021-11-19 14:14:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 117 [2021-11-19 14:14:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:14,989 INFO L225 Difference]: With dead ends: 1222 [2021-11-19 14:14:14,990 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 14:14:14,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 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 14:14:14,995 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 105 mSDsluCounter, 4803 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5790 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5790 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 14:14:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 608. [2021-11-19 14:14:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 480 states have (on average 1.66875) internal successors, (801), 498 states have internal predecessors, (801), 101 states have call successors, (101), 26 states have call predecessors, (101), 26 states have return successors, (103), 96 states have call predecessors, (103), 98 states have call successors, (103) [2021-11-19 14:14:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1005 transitions. [2021-11-19 14:14:15,031 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1005 transitions. Word has length 117 [2021-11-19 14:14:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:15,032 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1005 transitions. [2021-11-19 14:14:15,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1005 transitions. [2021-11-19 14:14:15,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:15,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:15,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:15,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:15,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:15,257 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1258723173, now seen corresponding path program 1 times [2021-11-19 14:14:15,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:15,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383375337] [2021-11-19 14:14:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:15,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:15,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:15,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:15,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:14:15,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:14:16,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:16,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383375337] [2021-11-19 14:14:16,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383375337] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:16,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:16,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:14:16,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598849852] [2021-11-19 14:14:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:16,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:16,112 INFO L87 Difference]: Start difference. First operand 608 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:16,206 INFO L93 Difference]: Finished difference Result 1207 states and 1999 transitions. [2021-11-19 14:14:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 117 [2021-11-19 14:14:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:16,212 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:14:16,213 INFO L226 Difference]: Without dead ends: 609 [2021-11-19 14:14:16,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 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 14:14:16,218 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 22 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:16,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2886 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-19 14:14:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2021-11-19 14:14:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 482 states have (on average 1.6680497925311204) internal successors, (804), 499 states have internal predecessors, (804), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-19 14:14:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1003 transitions. [2021-11-19 14:14:16,267 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1003 transitions. Word has length 117 [2021-11-19 14:14:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:16,267 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1003 transitions. [2021-11-19 14:14:16,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1003 transitions. [2021-11-19 14:14:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:14:16,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:16,274 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:16,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:16,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:16,494 INFO L85 PathProgramCache]: Analyzing trace with hash -9990083, now seen corresponding path program 1 times [2021-11-19 14:14:16,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:16,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024286492] [2021-11-19 14:14:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:16,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:16,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:16,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:17,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:17,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:17,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024286492] [2021-11-19 14:14:17,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024286492] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:17,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:17,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:14:17,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341218114] [2021-11-19 14:14:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:17,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:17,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:17,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:17,519 INFO L87 Difference]: Start difference. First operand 609 states and 1003 transitions. Second operand has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:17,834 INFO L93 Difference]: Finished difference Result 1212 states and 2004 transitions. [2021-11-19 14:14:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:17,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 119 [2021-11-19 14:14:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:17,842 INFO L225 Difference]: With dead ends: 1212 [2021-11-19 14:14:17,849 INFO L226 Difference]: Without dead ends: 618 [2021-11-19 14:14:17,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 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 14:14:17,857 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 104 mSDsluCounter, 4755 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5733 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5733 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-19 14:14:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 609. [2021-11-19 14:14:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 482 states have (on average 1.6680497925311204) internal successors, (804), 499 states have internal predecessors, (804), 100 states have call successors, (100), 27 states have call predecessors, (100), 26 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-19 14:14:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1003 transitions. [2021-11-19 14:14:17,890 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1003 transitions. Word has length 119 [2021-11-19 14:14:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:17,892 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1003 transitions. [2021-11-19 14:14:17,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1003 transitions. [2021-11-19 14:14:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:14:17,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:17,901 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:17,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:18,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -341935266, now seen corresponding path program 1 times [2021-11-19 14:14:18,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:18,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019635825] [2021-11-19 14:14:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:18,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:18,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:18,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:18,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:19,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:19,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019635825] [2021-11-19 14:14:19,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019635825] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:19,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:19,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:14:19,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988461783] [2021-11-19 14:14:19,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:19,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:19,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:19,085 INFO L87 Difference]: Start difference. First operand 609 states and 1003 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:19,348 INFO L93 Difference]: Finished difference Result 1232 states and 2042 transitions. [2021-11-19 14:14:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 120 [2021-11-19 14:14:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:19,355 INFO L225 Difference]: With dead ends: 1232 [2021-11-19 14:14:19,355 INFO L226 Difference]: Without dead ends: 638 [2021-11-19 14:14:19,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 234 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 14:14:19,361 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 112 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2730 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:19,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 2730 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-19 14:14:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 629. [2021-11-19 14:14:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 501 states have (on average 1.6626746506986028) internal successors, (833), 518 states have internal predecessors, (833), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:14:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1031 transitions. [2021-11-19 14:14:19,395 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1031 transitions. Word has length 120 [2021-11-19 14:14:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:19,396 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1031 transitions. [2021-11-19 14:14:19,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 14:14:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1031 transitions. [2021-11-19 14:14:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:14:19,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:19,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:19,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:19,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1645884601, now seen corresponding path program 1 times [2021-11-19 14:14:19,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:19,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534114912] [2021-11-19 14:14:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:19,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:19,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:14:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:20,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:20,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:20,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534114912] [2021-11-19 14:14:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534114912] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:20,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:20,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:14:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253475639] [2021-11-19 14:14:20,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:20,572 INFO L87 Difference]: Start difference. First operand 629 states and 1031 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:20,809 INFO L93 Difference]: Finished difference Result 1261 states and 2073 transitions. [2021-11-19 14:14:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 121 [2021-11-19 14:14:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:20,818 INFO L225 Difference]: With dead ends: 1261 [2021-11-19 14:14:20,818 INFO L226 Difference]: Without dead ends: 647 [2021-11-19 14:14:20,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 234 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 14:14:20,826 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 154 mSDsluCounter, 4683 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 5649 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:20,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 5649 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-19 14:14:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 629. [2021-11-19 14:14:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 501 states have (on average 1.6626746506986028) internal successors, (833), 518 states have internal predecessors, (833), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:14:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1031 transitions. [2021-11-19 14:14:20,856 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1031 transitions. Word has length 121 [2021-11-19 14:14:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:20,856 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1031 transitions. [2021-11-19 14:14:20,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1031 transitions. [2021-11-19 14:14:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:14:20,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:20,862 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:14:20,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:21,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:21,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 483679932, now seen corresponding path program 1 times [2021-11-19 14:14:21,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:21,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343373466] [2021-11-19 14:14:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:21,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:21,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:21,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:21,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:14:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:21,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:22,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:22,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343373466] [2021-11-19 14:14:22,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343373466] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:22,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:14:22,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055624987] [2021-11-19 14:14:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:22,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:22,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:22,133 INFO L87 Difference]: Start difference. First operand 629 states and 1031 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:22,458 INFO L93 Difference]: Finished difference Result 1256 states and 2064 transitions. [2021-11-19 14:14:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:14:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 122 [2021-11-19 14:14:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:22,465 INFO L225 Difference]: With dead ends: 1256 [2021-11-19 14:14:22,465 INFO L226 Difference]: Without dead ends: 642 [2021-11-19 14:14:22,470 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 14:14:22,471 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 112 mSDsluCounter, 5629 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6585 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:22,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 6585 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-19 14:14:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 633. [2021-11-19 14:14:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 505 states have (on average 1.6574257425742573) internal successors, (837), 522 states have internal predecessors, (837), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:14:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1035 transitions. [2021-11-19 14:14:22,497 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1035 transitions. Word has length 122 [2021-11-19 14:14:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:22,498 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1035 transitions. [2021-11-19 14:14:22,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:22,498 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1035 transitions. [2021-11-19 14:14:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:14:22,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:22,504 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] [2021-11-19 14:14:22,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:22,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,721 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1622711911, now seen corresponding path program 1 times [2021-11-19 14:14:22,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:22,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022703088] [2021-11-19 14:14:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:22,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:22,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:22,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:22,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:14:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:23,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:23,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:23,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022703088] [2021-11-19 14:14:23,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022703088] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:23,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:23,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:14:23,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333751609] [2021-11-19 14:14:23,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:23,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:23,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:23,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:23,778 INFO L87 Difference]: Start difference. First operand 633 states and 1035 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:24,163 INFO L93 Difference]: Finished difference Result 1266 states and 2076 transitions. [2021-11-19 14:14:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:14:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 123 [2021-11-19 14:14:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:24,170 INFO L225 Difference]: With dead ends: 1266 [2021-11-19 14:14:24,171 INFO L226 Difference]: Without dead ends: 648 [2021-11-19 14:14:24,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:14:24,177 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 108 mSDsluCounter, 5635 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6593 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:24,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6593 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-19 14:14:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 639. [2021-11-19 14:14:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 511 states have (on average 1.649706457925636) internal successors, (843), 528 states have internal predecessors, (843), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:14:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1041 transitions. [2021-11-19 14:14:24,209 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1041 transitions. Word has length 123 [2021-11-19 14:14:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:24,210 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1041 transitions. [2021-11-19 14:14:24,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1041 transitions. [2021-11-19 14:14:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:14:24,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:24,216 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] [2021-11-19 14:14:24,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:24,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:24,435 INFO L85 PathProgramCache]: Analyzing trace with hash 81252641, now seen corresponding path program 1 times [2021-11-19 14:14:24,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:24,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44609295] [2021-11-19 14:14:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:24,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:24,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:24,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:14:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:14:25,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:25,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44609295] [2021-11-19 14:14:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44609295] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:25,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:25,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:14:25,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064371409] [2021-11-19 14:14:25,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:25,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:25,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:25,530 INFO L87 Difference]: Start difference. First operand 639 states and 1041 transitions. Second operand has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:25,887 INFO L93 Difference]: Finished difference Result 1280 states and 2092 transitions. [2021-11-19 14:14:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:14:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 124 [2021-11-19 14:14:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:25,895 INFO L225 Difference]: With dead ends: 1280 [2021-11-19 14:14:25,895 INFO L226 Difference]: Without dead ends: 656 [2021-11-19 14:14:25,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:14:25,901 INFO L933 BasicCegarLoop]: 958 mSDtfsCounter, 108 mSDsluCounter, 5635 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 6593 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:25,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 6593 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-19 14:14:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 647. [2021-11-19 14:14:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 519 states have (on average 1.6396917148362236) internal successors, (851), 536 states have internal predecessors, (851), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:14:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1049 transitions. [2021-11-19 14:14:25,930 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1049 transitions. Word has length 124 [2021-11-19 14:14:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:25,930 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1049 transitions. [2021-11-19 14:14:25,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-19 14:14:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1049 transitions. [2021-11-19 14:14:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:14:25,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:25,937 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] [2021-11-19 14:14:25,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:26,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,159 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -352818850, now seen corresponding path program 1 times [2021-11-19 14:14:26,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:26,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69497959] [2021-11-19 14:14:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:26,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:26,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:26,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:14:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:27,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:27,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69497959] [2021-11-19 14:14:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69497959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:27,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:27,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:27,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702319106] [2021-11-19 14:14:27,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:27,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:27,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:27,155 INFO L87 Difference]: Start difference. First operand 647 states and 1049 transitions. Second operand has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:14:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:27,431 INFO L93 Difference]: Finished difference Result 1219 states and 1976 transitions. [2021-11-19 14:14:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 125 [2021-11-19 14:14:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:27,439 INFO L225 Difference]: With dead ends: 1219 [2021-11-19 14:14:27,439 INFO L226 Difference]: Without dead ends: 665 [2021-11-19 14:14:27,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 240 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 14:14:27,444 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 100 mSDsluCounter, 5621 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6587 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:27,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6587 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-19 14:14:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 654. [2021-11-19 14:14:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 523 states have (on average 1.6347992351816443) internal successors, (855), 542 states have internal predecessors, (855), 101 states have call successors, (101), 28 states have call predecessors, (101), 29 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-19 14:14:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1058 transitions. [2021-11-19 14:14:27,480 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1058 transitions. Word has length 125 [2021-11-19 14:14:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:27,480 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1058 transitions. [2021-11-19 14:14:27,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:14:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1058 transitions. [2021-11-19 14:14:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:27,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:27,487 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] [2021-11-19 14:14:27,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:27,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:27,705 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 336722548, now seen corresponding path program 1 times [2021-11-19 14:14:27,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:27,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807193456] [2021-11-19 14:14:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:27,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:27,707 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:27,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:14:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:28,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:28,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807193456] [2021-11-19 14:14:28,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807193456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:28,616 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:28,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:28,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359934729] [2021-11-19 14:14:28,616 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:28,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:28,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:28,618 INFO L87 Difference]: Start difference. First operand 654 states and 1058 transitions. Second operand has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:14:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:28,987 INFO L93 Difference]: Finished difference Result 1222 states and 1979 transitions. [2021-11-19 14:14:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-19 14:14:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:28,994 INFO L225 Difference]: With dead ends: 1222 [2021-11-19 14:14:28,994 INFO L226 Difference]: Without dead ends: 668 [2021-11-19 14:14:28,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 244 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 14:14:28,999 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 170 mSDsluCounter, 6671 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 7639 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:29,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 7639 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:14:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-19 14:14:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 661. [2021-11-19 14:14:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 527 states have (on average 1.6299810246679316) internal successors, (859), 548 states have internal predecessors, (859), 102 states have call successors, (102), 28 states have call predecessors, (102), 31 states have return successors, (106), 97 states have call predecessors, (106), 99 states have call successors, (106) [2021-11-19 14:14:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1067 transitions. [2021-11-19 14:14:29,047 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1067 transitions. Word has length 127 [2021-11-19 14:14:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:29,048 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1067 transitions. [2021-11-19 14:14:29,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 4 states have call successors, (24), 2 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:14:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1067 transitions. [2021-11-19 14:14:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:29,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:29,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:29,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:29,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:29,269 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash 144923480, now seen corresponding path program 1 times [2021-11-19 14:14:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:29,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75623001] [2021-11-19 14:14:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:29,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:29,272 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:29,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:14:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:29,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:14:30,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:30,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75623001] [2021-11-19 14:14:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75623001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:30,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:30,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:30,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403664350] [2021-11-19 14:14:30,189 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:30,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:30,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:30,190 INFO L87 Difference]: Start difference. First operand 661 states and 1067 transitions. Second operand has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:14:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:30,443 INFO L93 Difference]: Finished difference Result 1223 states and 1980 transitions. [2021-11-19 14:14:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 127 [2021-11-19 14:14:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:30,450 INFO L225 Difference]: With dead ends: 1223 [2021-11-19 14:14:30,450 INFO L226 Difference]: Without dead ends: 669 [2021-11-19 14:14:30,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 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 14:14:30,454 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 145 mSDsluCounter, 5593 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:30,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 6563 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-19 14:14:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 664. [2021-11-19 14:14:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 529 states have (on average 1.6275992438563327) internal successors, (861), 551 states have internal predecessors, (861), 102 states have call successors, (102), 28 states have call predecessors, (102), 32 states have return successors, (107), 97 states have call predecessors, (107), 99 states have call successors, (107) [2021-11-19 14:14:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1070 transitions. [2021-11-19 14:14:30,483 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1070 transitions. Word has length 127 [2021-11-19 14:14:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:30,483 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1070 transitions. [2021-11-19 14:14:30,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:14:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1070 transitions. [2021-11-19 14:14:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:14:30,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:30,490 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] [2021-11-19 14:14:30,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,708 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1647777530, now seen corresponding path program 1 times [2021-11-19 14:14:30,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:30,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710672865] [2021-11-19 14:14:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:30,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:30,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:30,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:30,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:14:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:31,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:14:31,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:14:31,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:31,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710672865] [2021-11-19 14:14:31,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710672865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:31,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:31,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:14:31,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219795062] [2021-11-19 14:14:31,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:31,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:31,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:31,514 INFO L87 Difference]: Start difference. First operand 664 states and 1070 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:14:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:31,599 INFO L93 Difference]: Finished difference Result 1293 states and 2088 transitions. [2021-11-19 14:14:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2021-11-19 14:14:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:31,605 INFO L225 Difference]: With dead ends: 1293 [2021-11-19 14:14:31,606 INFO L226 Difference]: Without dead ends: 614 [2021-11-19 14:14:31,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 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 14:14:31,612 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 37 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:31,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1925 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-19 14:14:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-19 14:14:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 486 states have (on average 1.6111111111111112) internal successors, (783), 503 states have internal predecessors, (783), 100 states have call successors, (100), 28 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:14:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 980 transitions. [2021-11-19 14:14:31,638 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 980 transitions. Word has length 127 [2021-11-19 14:14:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:31,639 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 980 transitions. [2021-11-19 14:14:31,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:14:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 980 transitions. [2021-11-19 14:14:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:14:31,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:31,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:31,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:31,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:31,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:31,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1551149653, now seen corresponding path program 1 times [2021-11-19 14:14:31,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:31,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698309952] [2021-11-19 14:14:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:31,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:31,861 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:31,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:14:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:32,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:32,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:32,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:32,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698309952] [2021-11-19 14:14:32,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698309952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:32,716 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:32,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:14:32,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139654938] [2021-11-19 14:14:32,717 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:32,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:32,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:32,718 INFO L87 Difference]: Start difference. First operand 614 states and 980 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:14:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:32,888 INFO L93 Difference]: Finished difference Result 1254 states and 1993 transitions. [2021-11-19 14:14:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 129 [2021-11-19 14:14:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:32,895 INFO L225 Difference]: With dead ends: 1254 [2021-11-19 14:14:32,895 INFO L226 Difference]: Without dead ends: 611 [2021-11-19 14:14:32,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:32,900 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 183 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:32,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 2719 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-19 14:14:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 611. [2021-11-19 14:14:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 483 states have (on average 1.5900621118012421) internal successors, (768), 499 states have internal predecessors, (768), 100 states have call successors, (100), 29 states have call predecessors, (100), 27 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:14:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 965 transitions. [2021-11-19 14:14:32,925 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 965 transitions. Word has length 129 [2021-11-19 14:14:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:32,926 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 965 transitions. [2021-11-19 14:14:32,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-19 14:14:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 965 transitions. [2021-11-19 14:14:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:14:32,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:32,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:32,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:33,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:33,151 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 794842570, now seen corresponding path program 1 times [2021-11-19 14:14:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:33,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492876652] [2021-11-19 14:14:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:33,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:33,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:33,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:14:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:14:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:34,842 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 14:14:34,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:34,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492876652] [2021-11-19 14:14:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492876652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:34,843 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:34,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 14:14:34,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044823290] [2021-11-19 14:14:34,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:34,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:14:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:14:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:34,845 INFO L87 Difference]: Start difference. First operand 611 states and 965 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:14:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:38,222 INFO L93 Difference]: Finished difference Result 1825 states and 2974 transitions. [2021-11-19 14:14:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:14:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 130 [2021-11-19 14:14:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:38,235 INFO L225 Difference]: With dead ends: 1825 [2021-11-19 14:14:38,236 INFO L226 Difference]: Without dead ends: 1275 [2021-11-19 14:14:38,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:38,241 INFO L933 BasicCegarLoop]: 1023 mSDtfsCounter, 1140 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 3920 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:38,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 3920 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 14:14:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-19 14:14:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1172. [2021-11-19 14:14:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 928 states have (on average 1.6142241379310345) internal successors, (1498), 956 states have internal predecessors, (1498), 197 states have call successors, (197), 48 states have call predecessors, (197), 46 states have return successors, (202), 182 states have call predecessors, (202), 193 states have call successors, (202) [2021-11-19 14:14:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1897 transitions. [2021-11-19 14:14:38,309 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1897 transitions. Word has length 130 [2021-11-19 14:14:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:38,309 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1897 transitions. [2021-11-19 14:14:38,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:14:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1897 transitions. [2021-11-19 14:14:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:14:38,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:38,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:38,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:38,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1632877215, now seen corresponding path program 1 times [2021-11-19 14:14:38,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:38,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47436084] [2021-11-19 14:14:38,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:38,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:38,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:38,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:14:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:14:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:14:39,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:39,691 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 14:14:39,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:39,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47436084] [2021-11-19 14:14:39,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47436084] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:14:39,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:14:39,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-19 14:14:39,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591914173] [2021-11-19 14:14:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:39,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:39,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:39,693 INFO L87 Difference]: Start difference. First operand 1172 states and 1897 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:14:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:43,480 INFO L93 Difference]: Finished difference Result 3946 states and 6655 transitions. [2021-11-19 14:14:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 131 [2021-11-19 14:14:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:43,508 INFO L225 Difference]: With dead ends: 3946 [2021-11-19 14:14:43,508 INFO L226 Difference]: Without dead ends: 2835 [2021-11-19 14:14:43,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:43,519 INFO L933 BasicCegarLoop]: 1157 mSDtfsCounter, 1897 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:43,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 4554 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:14:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-11-19 14:14:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2211. [2021-11-19 14:14:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1747 states have (on average 1.638236977676016) internal successors, (2862), 1803 states have internal predecessors, (2862), 376 states have call successors, (376), 84 states have call predecessors, (376), 87 states have return successors, (444), 353 states have call predecessors, (444), 370 states have call successors, (444) [2021-11-19 14:14:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3682 transitions. [2021-11-19 14:14:43,717 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3682 transitions. Word has length 131 [2021-11-19 14:14:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:43,718 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 3682 transitions. [2021-11-19 14:14:43,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-19 14:14:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3682 transitions. [2021-11-19 14:14:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:14:43,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:43,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:43,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,941 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1796016503, now seen corresponding path program 1 times [2021-11-19 14:14:43,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:43,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985806330] [2021-11-19 14:14:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:43,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:43,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:43,942 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:14:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:14:44,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:14:44,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:44,951 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 14:14:44,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:44,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985806330] [2021-11-19 14:14:44,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985806330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:44,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:44,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-19 14:14:44,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327864735] [2021-11-19 14:14:44,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:44,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:44,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:44,953 INFO L87 Difference]: Start difference. First operand 2211 states and 3682 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:14:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:46,678 INFO L93 Difference]: Finished difference Result 7272 states and 12479 transitions. [2021-11-19 14:14:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 132 [2021-11-19 14:14:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:46,731 INFO L225 Difference]: With dead ends: 7272 [2021-11-19 14:14:46,731 INFO L226 Difference]: Without dead ends: 5122 [2021-11-19 14:14:46,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:46,753 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1355 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 3612 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 3612 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 14:14:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-11-19 14:14:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 4848. [2021-11-19 14:14:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4848 states, 3711 states have (on average 1.6081918620317974) internal successors, (5968), 3869 states have internal predecessors, (5968), 955 states have call successors, (955), 170 states have call predecessors, (955), 181 states have return successors, (1189), 888 states have call predecessors, (1189), 945 states have call successors, (1189) [2021-11-19 14:14:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 8112 transitions. [2021-11-19 14:14:47,153 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 8112 transitions. Word has length 132 [2021-11-19 14:14:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:47,154 INFO L470 AbstractCegarLoop]: Abstraction has 4848 states and 8112 transitions. [2021-11-19 14:14:47,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 14:14:47,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 8112 transitions. [2021-11-19 14:14:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:14:47,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:47,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:47,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:47,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,377 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1909820841, now seen corresponding path program 1 times [2021-11-19 14:14:47,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:47,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207427061] [2021-11-19 14:14:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:47,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:47,379 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:47,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:14:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:47,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:14:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:14:47,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:48,242 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 14:14:48,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:48,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207427061] [2021-11-19 14:14:48,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207427061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:48,242 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:48,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 7 [2021-11-19 14:14:48,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183626321] [2021-11-19 14:14:48,243 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:48,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:14:48,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:48,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:14:48,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:14:48,244 INFO L87 Difference]: Start difference. First operand 4848 states and 8112 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:14:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:50,287 INFO L93 Difference]: Finished difference Result 15554 states and 27661 transitions. [2021-11-19 14:14:50,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:50,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) Word has length 138 [2021-11-19 14:14:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:50,398 INFO L225 Difference]: With dead ends: 15554 [2021-11-19 14:14:50,398 INFO L226 Difference]: Without dead ends: 10767 [2021-11-19 14:14:50,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:50,444 INFO L933 BasicCegarLoop]: 1232 mSDtfsCounter, 1242 mSDsluCounter, 4249 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 5481 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:50,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 5481 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:14:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-11-19 14:14:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 7927. [2021-11-19 14:14:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7927 states, 6018 states have (on average 1.5937188434695913) internal successors, (9591), 6276 states have internal predecessors, (9591), 1614 states have call successors, (1614), 260 states have call predecessors, (1614), 294 states have return successors, (2296), 1546 states have call predecessors, (2296), 1600 states have call successors, (2296) [2021-11-19 14:14:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7927 states to 7927 states and 13501 transitions. [2021-11-19 14:14:51,268 INFO L78 Accepts]: Start accepts. Automaton has 7927 states and 13501 transitions. Word has length 138 [2021-11-19 14:14:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 7927 states and 13501 transitions. [2021-11-19 14:14:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (28), 4 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:14:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7927 states and 13501 transitions. [2021-11-19 14:14:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 14:14:51,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:51,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:51,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:51,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:51,502 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -394492542, now seen corresponding path program 1 times [2021-11-19 14:14:51,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:51,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332651891] [2021-11-19 14:14:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:51,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:51,504 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:51,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:14:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:14:52,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:52,356 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 14:14:52,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:52,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332651891] [2021-11-19 14:14:52,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332651891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:52,357 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:52,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:14:52,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194971901] [2021-11-19 14:14:52,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:52,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:52,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:52,358 INFO L87 Difference]: Start difference. First operand 7927 states and 13501 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:14:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:54,002 INFO L93 Difference]: Finished difference Result 21529 states and 38248 transitions. [2021-11-19 14:14:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2021-11-19 14:14:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:54,088 INFO L225 Difference]: With dead ends: 21529 [2021-11-19 14:14:54,088 INFO L226 Difference]: Without dead ends: 13663 [2021-11-19 14:14:54,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:54,150 INFO L933 BasicCegarLoop]: 1780 mSDtfsCounter, 1704 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:54,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1704 Valid, 3156 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13663 states. [2021-11-19 14:14:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13663 to 13659. [2021-11-19 14:14:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13659 states, 10316 states have (on average 1.5846258239627762) internal successors, (16347), 10780 states have internal predecessors, (16347), 2840 states have call successors, (2840), 440 states have call predecessors, (2840), 502 states have return successors, (4461), 2746 states have call predecessors, (4461), 2818 states have call successors, (4461) [2021-11-19 14:14:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 23648 transitions. [2021-11-19 14:14:55,097 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 23648 transitions. Word has length 139 [2021-11-19 14:14:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:55,098 INFO L470 AbstractCegarLoop]: Abstraction has 13659 states and 23648 transitions. [2021-11-19 14:14:55,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:14:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 23648 transitions. [2021-11-19 14:14:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 14:14:55,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:55,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:55,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:55,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,322 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1994582036, now seen corresponding path program 1 times [2021-11-19 14:14:55,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:55,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112149657] [2021-11-19 14:14:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:55,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:55,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:55,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:14:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:14:55,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:14:56,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:56,393 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 14:14:56,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:56,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112149657] [2021-11-19 14:14:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112149657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:56,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:56,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:14:56,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122832324] [2021-11-19 14:14:56,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:56,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:14:56,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:14:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:56,395 INFO L87 Difference]: Start difference. First operand 13659 states and 23648 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:14:58,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:58,798 INFO L93 Difference]: Finished difference Result 38745 states and 70830 transitions. [2021-11-19 14:14:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 140 [2021-11-19 14:14:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:58,977 INFO L225 Difference]: With dead ends: 38745 [2021-11-19 14:14:58,977 INFO L226 Difference]: Without dead ends: 25147 [2021-11-19 14:14:59,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:14:59,125 INFO L933 BasicCegarLoop]: 1789 mSDtfsCounter, 1712 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 3172 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:14:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25147 states. [2021-11-19 14:15:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25147 to 25143. [2021-11-19 14:15:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25143 states, 18928 states have (on average 1.577187235841082) internal successors, (29853), 19804 states have internal predecessors, (29853), 5296 states have call successors, (5296), 800 states have call predecessors, (5296), 918 states have return successors, (9462), 5150 states have call predecessors, (9462), 5258 states have call successors, (9462) [2021-11-19 14:15:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25143 states to 25143 states and 44611 transitions. [2021-11-19 14:15:01,428 INFO L78 Accepts]: Start accepts. Automaton has 25143 states and 44611 transitions. Word has length 140 [2021-11-19 14:15:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 25143 states and 44611 transitions. [2021-11-19 14:15:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25143 states and 44611 transitions. [2021-11-19 14:15:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:15:01,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:01,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:01,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:01,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,647 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1838749277, now seen corresponding path program 1 times [2021-11-19 14:15:01,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:01,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763895455] [2021-11-19 14:15:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:01,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:01,650 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:01,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:15:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:15:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:02,662 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 14:15:02,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:02,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763895455] [2021-11-19 14:15:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763895455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:02,663 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:02,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:15:02,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594157659] [2021-11-19 14:15:02,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:02,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:02,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:02,664 INFO L87 Difference]: Start difference. First operand 25143 states and 44611 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:06,775 INFO L93 Difference]: Finished difference Result 73217 states and 140186 transitions. [2021-11-19 14:15:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:06,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 141 [2021-11-19 14:15:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:07,226 INFO L225 Difference]: With dead ends: 73217 [2021-11-19 14:15:07,226 INFO L226 Difference]: Without dead ends: 48135 [2021-11-19 14:15:07,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:07,549 INFO L933 BasicCegarLoop]: 1798 mSDtfsCounter, 1720 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:07,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 3188 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48135 states. [2021-11-19 14:15:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48135 to 48131. [2021-11-19 14:15:10,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48131 states, 36168 states have (on average 1.5705319619553195) internal successors, (56803), 37868 states have internal predecessors, (56803), 10212 states have call successors, (10212), 1520 states have call predecessors, (10212), 1750 states have return successors, (21857), 9962 states have call predecessors, (21857), 10142 states have call successors, (21857) [2021-11-19 14:15:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48131 states to 48131 states and 88872 transitions. [2021-11-19 14:15:11,773 INFO L78 Accepts]: Start accepts. Automaton has 48131 states and 88872 transitions. Word has length 141 [2021-11-19 14:15:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:11,773 INFO L470 AbstractCegarLoop]: Abstraction has 48131 states and 88872 transitions. [2021-11-19 14:15:11,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 48131 states and 88872 transitions. [2021-11-19 14:15:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:15:11,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:11,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:11,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 14:15:11,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,995 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:11,996 INFO L85 PathProgramCache]: Analyzing trace with hash 100200399, now seen corresponding path program 1 times [2021-11-19 14:15:11,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:11,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061421332] [2021-11-19 14:15:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:11,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:11,998 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:15:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:15:12,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:12,922 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 14:15:12,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:12,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061421332] [2021-11-19 14:15:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061421332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:12,923 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-19 14:15:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743939612] [2021-11-19 14:15:12,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:15:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:15:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:12,925 INFO L87 Difference]: Start difference. First operand 48131 states and 88872 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:22,090 INFO L93 Difference]: Finished difference Result 142201 states and 294556 transitions. [2021-11-19 14:15:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:15:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 142 [2021-11-19 14:15:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:22,786 INFO L225 Difference]: With dead ends: 142201 [2021-11-19 14:15:22,786 INFO L226 Difference]: Without dead ends: 94131 [2021-11-19 14:15:23,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:15:23,727 INFO L933 BasicCegarLoop]: 1807 mSDtfsCounter, 1728 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 3204 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:23,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 3204 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:15:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94131 states. [2021-11-19 14:15:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94131 to 94127. [2021-11-19 14:15:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94127 states, 70664 states have (on average 1.5641486471187591) internal successors, (110529), 74012 states have internal predecessors, (110529), 20048 states have call successors, (20048), 2960 states have call predecessors, (20048), 3414 states have return successors, (55652), 19590 states have call predecessors, (55652), 19914 states have call successors, (55652) [2021-11-19 14:15:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94127 states to 94127 states and 186229 transitions. [2021-11-19 14:15:32,534 INFO L78 Accepts]: Start accepts. Automaton has 94127 states and 186229 transitions. Word has length 142 [2021-11-19 14:15:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:32,534 INFO L470 AbstractCegarLoop]: Abstraction has 94127 states and 186229 transitions. [2021-11-19 14:15:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:15:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94127 states and 186229 transitions. [2021-11-19 14:15:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:15:32,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:32,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:32,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,760 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -380879859, now seen corresponding path program 1 times [2021-11-19 14:15:32,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:32,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624315928] [2021-11-19 14:15:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:32,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:32,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:32,761 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:32,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dad0bfa0-c851-488b-bc24-cdffa37a86a4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:15:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:15:33,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:33,961 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 14:15:33,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:33,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624315928] [2021-11-19 14:15:33,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624315928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:33,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:33,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2021-11-19 14:15:33,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283485272] [2021-11-19 14:15:33,962 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:33,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:15:33,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:15:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:15:33,964 INFO L87 Difference]: Start difference. First operand 94127 states and 186229 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 11 states have internal predecessors, (156), 5 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28)