./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/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_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/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_76b86f44-af4d-43b1-a410-b77b0f1f3478/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:15,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:15,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:15,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:15,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:15,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:15,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:15,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:15,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:15,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:15,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:15,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:15,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:15,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:15,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:15,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:15,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:15,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:15,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:15,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:15,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:15,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:15,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:15,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:15,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:15,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:15,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:15,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:15,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:15,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:15,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:15,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:15,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:15,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:15,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:15,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:15,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:15,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:15,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:15,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:15,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:15,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:50:15,571 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:15,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:15,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:15,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:15,574 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:15,574 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:15,574 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:15,574 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:50:15,575 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:15,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:15,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:50:15,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:50:15,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:15,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:50:15,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:50:15,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:50:15,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:15,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:15,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:50:15,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:15,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:15,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:15,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:15,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:15,586 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:15,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:15,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:15,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:15,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:15,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:15,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:15,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:15,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:15,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:15,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:15,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:50:15,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:50:15,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:15,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:15,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:15,591 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-19 14:50:15,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:15,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:15,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:15,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:15,873 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:15,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-19 14:50:15,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/d6df65c06/58425ebbbb2849a4964eb46345793b62/FLAG60d8fc10b [2021-11-19 14:50:16,550 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:16,550 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-19 14:50:16,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/d6df65c06/58425ebbbb2849a4964eb46345793b62/FLAG60d8fc10b [2021-11-19 14:50:16,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/d6df65c06/58425ebbbb2849a4964eb46345793b62 [2021-11-19 14:50:16,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:16,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:16,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:16,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:16,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:16,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:16" (1/1) ... [2021-11-19 14:50:16,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a907fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:16, skipping insertion in model container [2021-11-19 14:50:16,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:16" (1/1) ... [2021-11-19 14:50:16,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:16,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:17,047 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-19 14:50:17,449 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:17,461 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 14:50:17,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49c04930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:17, skipping insertion in model container [2021-11-19 14:50:17,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:17,462 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:50:17,464 INFO L158 Benchmark]: Toolchain (without parser) took 693.42ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 44.5MB in the beginning and 69.7MB in the end (delta: -25.3MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 14:50:17,465 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 63.5MB in the beginning and 63.5MB in the end (delta: 38.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:50:17,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 690.75ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 44.3MB in the beginning and 69.7MB in the end (delta: -25.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 14:50:17,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 63.5MB in the beginning and 63.5MB in the end (delta: 38.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 690.75ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 44.3MB in the beginning and 69.7MB in the end (delta: -25.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2544]: 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/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_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/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_76b86f44-af4d-43b1-a410-b77b0f1f3478/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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:19,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:19,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:19,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:19,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:19,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:19,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:19,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:19,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:19,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:19,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:19,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:19,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:19,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:19,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:19,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:19,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:19,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:19,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:19,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:19,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:19,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:19,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:19,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:19,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:19,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:19,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:19,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:19,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:19,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:19,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:19,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:19,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:19,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:19,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:19,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:19,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:19,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:19,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:19,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:19,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:19,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:50:19,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:19,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:19,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:19,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:19,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:19,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:19,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:19,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:19,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:19,963 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:19,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:19,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:19,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:19,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:19,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:19,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:19,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:19,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:19,967 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:50:19,968 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:50:19,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:19,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:19,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:19,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:19,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:19,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:50:19,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:19,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:19,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:19,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:19,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:19,970 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:50:19,971 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:19,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:19,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:19,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:19,972 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-11-19 14:50:20,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:20,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:20,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:20,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:20,422 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:20,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-19 14:50:20,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/5e245aef3/cf30726cac0d4850a75f92fd691b3c88/FLAG2a3db642f [2021-11-19 14:50:21,282 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:21,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-11-19 14:50:21,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/5e245aef3/cf30726cac0d4850a75f92fd691b3c88/FLAG2a3db642f [2021-11-19 14:50:21,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/data/5e245aef3/cf30726cac0d4850a75f92fd691b3c88 [2021-11-19 14:50:21,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:21,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:21,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:21,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:21,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:21,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:21" (1/1) ... [2021-11-19 14:50:21,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd95680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:21, skipping insertion in model container [2021-11-19 14:50:21,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:21" (1/1) ... [2021-11-19 14:50:21,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:21,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:21,694 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-19 14:50:22,122 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:22,135 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:50:22,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:22,154 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_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-19 14:50:22,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:22,261 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:50:22,274 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-11-19 14:50:22,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:22,374 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:50:22,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22 WrapperNode [2021-11-19 14:50:22,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:22,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:22,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:50:22,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:50:22,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,490 INFO L137 Inliner]: procedures = 90, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 703 [2021-11-19 14:50:22,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:22,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:50:22,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:50:22,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:50:22,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:50:22,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:50:22,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:50:22,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:50:22,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (1/1) ... [2021-11-19 14:50:22,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:22,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:22,595 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:50:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:50:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:50:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:50:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:50:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:50:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:50:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:50:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:50:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:50:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:50:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:50:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:50:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:50:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:50:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:50:22,657 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:50:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:50:22,657 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:50:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:50:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:50:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:50:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:50:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:50:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:50:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:50:22,659 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:50:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:50:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:50:22,659 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:50:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:50:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:50:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:50:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:50:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:50:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:50:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:50:22,661 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:50:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:50:22,661 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:50:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:50:22,662 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:50:22,662 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:50:22,662 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:50:22,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:50:22,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:50:22,663 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:50:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:50:22,833 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:50:22,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:50:24,040 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:50:24,053 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:50:24,053 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:50:24,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:24 BoogieIcfgContainer [2021-11-19 14:50:24,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:50:24,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:50:24,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:50:24,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:50:24,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:50:21" (1/3) ... [2021-11-19 14:50:24,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0b74c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:24, skipping insertion in model container [2021-11-19 14:50:24,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:22" (2/3) ... [2021-11-19 14:50:24,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0b74c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:24, skipping insertion in model container [2021-11-19 14:50:24,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:24" (3/3) ... [2021-11-19 14:50:24,065 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2021-11-19 14:50:24,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:50:24,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:50:24,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:50:24,131 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 14:50:24,132 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:50:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:50:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:50:24,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:24,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:24,227 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 775009711, now seen corresponding path program 1 times [2021-11-19 14:50:24,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:24,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610920059] [2021-11-19 14:50:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:24,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:24,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:24,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:50:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:50:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:50:25,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:50:25,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:25,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610920059] [2021-11-19 14:50:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610920059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:25,268 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:25,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:50:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166384662] [2021-11-19 14:50:25,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:25,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:50:25,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:50:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:25,317 INFO L87 Difference]: Start difference. First operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:50:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:25,428 INFO L93 Difference]: Finished difference Result 545 states and 913 transitions. [2021-11-19 14:50:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:50:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-11-19 14:50:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:25,455 INFO L225 Difference]: With dead ends: 545 [2021-11-19 14:50:25,455 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:50:25,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:25,463 INFO L933 BasicCegarLoop]: 874 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, 874 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 14:50:25,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:50:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:50:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.70935960591133) internal successors, (694), 425 states have internal predecessors, (694), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 867 transitions. [2021-11-19 14:50:25,564 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 867 transitions. Word has length 97 [2021-11-19 14:50:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:25,577 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 867 transitions. [2021-11-19 14:50:25,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:50:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 867 transitions. [2021-11-19 14:50:25,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:50:25,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:25,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:25,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:25,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:25,799 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1728523875, now seen corresponding path program 1 times [2021-11-19 14:50:25,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:25,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376223521] [2021-11-19 14:50:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:25,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:25,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:25,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:50:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:26,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:26,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:26,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376223521] [2021-11-19 14:50:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376223521] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:26,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:26,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:26,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576572050] [2021-11-19 14:50:26,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:26,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:26,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:26,879 INFO L87 Difference]: Start difference. First operand 516 states and 867 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:27,011 INFO L93 Difference]: Finished difference Result 1023 states and 1726 transitions. [2021-11-19 14:50:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-11-19 14:50:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:27,020 INFO L225 Difference]: With dead ends: 1023 [2021-11-19 14:50:27,021 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:50:27,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:27,031 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 14 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:27,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:50:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:50:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.706896551724138) internal successors, (693), 425 states have internal predecessors, (693), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 866 transitions. [2021-11-19 14:50:27,108 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 866 transitions. Word has length 99 [2021-11-19 14:50:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:27,111 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 866 transitions. [2021-11-19 14:50:27,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 866 transitions. [2021-11-19 14:50:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:50:27,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:27,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:27,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:27,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash -826883435, now seen corresponding path program 1 times [2021-11-19 14:50:27,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:27,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174621465] [2021-11-19 14:50:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:27,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:27,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:27,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:27,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:50:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:28,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:28,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:28,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174621465] [2021-11-19 14:50:28,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174621465] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:28,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:28,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:28,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538705516] [2021-11-19 14:50:28,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:28,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:28,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:28,274 INFO L87 Difference]: Start difference. First operand 516 states and 866 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:28,358 INFO L93 Difference]: Finished difference Result 1023 states and 1724 transitions. [2021-11-19 14:50:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-11-19 14:50:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:28,365 INFO L225 Difference]: With dead ends: 1023 [2021-11-19 14:50:28,365 INFO L226 Difference]: Without dead ends: 516 [2021-11-19 14:50:28,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:28,372 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 12 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:28,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2552 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-19 14:50:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-11-19 14:50:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.7044334975369457) internal successors, (692), 425 states have internal predecessors, (692), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 865 transitions. [2021-11-19 14:50:28,416 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 865 transitions. Word has length 101 [2021-11-19 14:50:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 865 transitions. [2021-11-19 14:50:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 865 transitions. [2021-11-19 14:50:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:50:28,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:28,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:28,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:28,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:28,647 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash 834246499, now seen corresponding path program 1 times [2021-11-19 14:50:28,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:28,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901028758] [2021-11-19 14:50:28,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:28,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:28,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:28,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:28,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:50:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:29,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:29,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:29,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901028758] [2021-11-19 14:50:29,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901028758] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:29,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:29,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:29,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762682922] [2021-11-19 14:50:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:29,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:29,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:29,481 INFO L87 Difference]: Start difference. First operand 516 states and 865 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:29,560 INFO L93 Difference]: Finished difference Result 1027 states and 1727 transitions. [2021-11-19 14:50:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-11-19 14:50:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:29,567 INFO L225 Difference]: With dead ends: 1027 [2021-11-19 14:50:29,567 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:50:29,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:29,571 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 13 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:29,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:50:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-19 14:50:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6958637469586375) internal successors, (697), 430 states have internal predecessors, (697), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 870 transitions. [2021-11-19 14:50:29,599 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 870 transitions. Word has length 103 [2021-11-19 14:50:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 870 transitions. [2021-11-19 14:50:29,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 870 transitions. [2021-11-19 14:50:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:50:29,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:29,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:29,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:50:29,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:29,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1162426420, now seen corresponding path program 1 times [2021-11-19 14:50:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:29,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033922439] [2021-11-19 14:50:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:29,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:29,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:29,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:50:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:30,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:30,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033922439] [2021-11-19 14:50:30,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033922439] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:30,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:30,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032531514] [2021-11-19 14:50:30,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:30,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:30,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:30,709 INFO L87 Difference]: Start difference. First operand 522 states and 870 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:30,780 INFO L93 Difference]: Finished difference Result 1026 states and 1718 transitions. [2021-11-19 14:50:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-19 14:50:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:30,787 INFO L225 Difference]: With dead ends: 1026 [2021-11-19 14:50:30,787 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:50:30,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:30,795 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 8 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:30,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2553 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:50:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-19 14:50:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6934306569343065) internal successors, (696), 430 states have internal predecessors, (696), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 869 transitions. [2021-11-19 14:50:30,826 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 869 transitions. Word has length 104 [2021-11-19 14:50:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:30,827 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 869 transitions. [2021-11-19 14:50:30,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 869 transitions. [2021-11-19 14:50:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:50:30,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:30,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:30,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:31,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:31,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -176244601, now seen corresponding path program 1 times [2021-11-19 14:50:31,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:31,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314104050] [2021-11-19 14:50:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:31,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:31,055 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:31,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:50:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:31,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:31,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:31,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:31,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314104050] [2021-11-19 14:50:31,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314104050] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:31,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:31,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:31,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131952402] [2021-11-19 14:50:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:31,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:31,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:31,924 INFO L87 Difference]: Start difference. First operand 522 states and 869 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:31,986 INFO L93 Difference]: Finished difference Result 1026 states and 1717 transitions. [2021-11-19 14:50:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-11-19 14:50:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:31,993 INFO L225 Difference]: With dead ends: 1026 [2021-11-19 14:50:31,993 INFO L226 Difference]: Without dead ends: 522 [2021-11-19 14:50:31,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:32,001 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 6 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2553 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-19 14:50:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-19 14:50:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 411 states have (on average 1.6909975669099757) internal successors, (695), 430 states have internal predecessors, (695), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 868 transitions. [2021-11-19 14:50:32,029 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 868 transitions. Word has length 105 [2021-11-19 14:50:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:32,031 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 868 transitions. [2021-11-19 14:50:32,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 868 transitions. [2021-11-19 14:50:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:50:32,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:32,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:32,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:32,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:32,249 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1210846416, now seen corresponding path program 1 times [2021-11-19 14:50:32,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:32,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936888191] [2021-11-19 14:50:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:32,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:32,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:32,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:50:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:32,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:32,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:33,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:33,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936888191] [2021-11-19 14:50:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936888191] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:33,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:33,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:50:33,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798231889] [2021-11-19 14:50:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:33,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:33,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:33,261 INFO L87 Difference]: Start difference. First operand 522 states and 868 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:33,455 INFO L93 Difference]: Finished difference Result 1043 states and 1745 transitions. [2021-11-19 14:50:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:33,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-11-19 14:50:33,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:33,463 INFO L225 Difference]: With dead ends: 1043 [2021-11-19 14:50:33,463 INFO L226 Difference]: Without dead ends: 543 [2021-11-19 14:50:33,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:33,467 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 148 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5005 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:33,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5005 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-19 14:50:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2021-11-19 14:50:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 427 states have (on average 1.6885245901639345) internal successors, (721), 448 states have internal predecessors, (721), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-11-19 14:50:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 899 transitions. [2021-11-19 14:50:33,494 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 899 transitions. Word has length 106 [2021-11-19 14:50:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:33,495 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 899 transitions. [2021-11-19 14:50:33,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:33,495 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 899 transitions. [2021-11-19 14:50:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:50:33,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:33,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:33,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:33,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1596213199, now seen corresponding path program 1 times [2021-11-19 14:50:33,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:33,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735858630] [2021-11-19 14:50:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:33,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:33,718 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:33,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:50:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:34,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:34,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:34,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735858630] [2021-11-19 14:50:34,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735858630] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:34,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:34,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:50:34,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022331110] [2021-11-19 14:50:34,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:34,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:34,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:50:34,622 INFO L87 Difference]: Start difference. First operand 541 states and 899 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:34,689 INFO L93 Difference]: Finished difference Result 1056 states and 1767 transitions. [2021-11-19 14:50:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-19 14:50:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:34,695 INFO L225 Difference]: With dead ends: 1056 [2021-11-19 14:50:34,696 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:50:34,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:34,700 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 8 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:34,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2552 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:50:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:50:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6894117647058824) internal successors, (718), 445 states have internal predecessors, (718), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:50:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 892 transitions. [2021-11-19 14:50:34,724 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 892 transitions. Word has length 106 [2021-11-19 14:50:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 892 transitions. [2021-11-19 14:50:34,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 892 transitions. [2021-11-19 14:50:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:50:34,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:34,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:34,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:34,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:34,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1734576698, now seen corresponding path program 1 times [2021-11-19 14:50:34,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:34,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5850090] [2021-11-19 14:50:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:34,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:34,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:34,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:50:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:35,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:35,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:35,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:35,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5850090] [2021-11-19 14:50:35,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5850090] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:35,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:35,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16546663] [2021-11-19 14:50:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:35,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:35,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:35,817 INFO L87 Difference]: Start difference. First operand 537 states and 892 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:36,012 INFO L93 Difference]: Finished difference Result 1082 states and 1812 transitions. [2021-11-19 14:50:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 107 [2021-11-19 14:50:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:36,021 INFO L225 Difference]: With dead ends: 1082 [2021-11-19 14:50:36,021 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:50:36,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:36,027 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 134 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:36,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2360 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:50:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:50:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6776470588235295) internal successors, (713), 445 states have internal predecessors, (713), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:50:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 887 transitions. [2021-11-19 14:50:36,057 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 887 transitions. Word has length 107 [2021-11-19 14:50:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:36,058 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 887 transitions. [2021-11-19 14:50:36,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 887 transitions. [2021-11-19 14:50:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 14:50:36,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:36,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:36,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:36,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:36,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash 994765132, now seen corresponding path program 1 times [2021-11-19 14:50:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:36,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272198774] [2021-11-19 14:50:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:36,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:36,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:36,282 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:36,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:50:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:36,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:36,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:37,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:37,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272198774] [2021-11-19 14:50:37,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272198774] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:37,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:37,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:37,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736919273] [2021-11-19 14:50:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:37,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:37,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:37,175 INFO L87 Difference]: Start difference. First operand 537 states and 887 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:37,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:37,347 INFO L93 Difference]: Finished difference Result 1082 states and 1802 transitions. [2021-11-19 14:50:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 109 [2021-11-19 14:50:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:37,354 INFO L225 Difference]: With dead ends: 1082 [2021-11-19 14:50:37,354 INFO L226 Difference]: Without dead ends: 537 [2021-11-19 14:50:37,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:37,358 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 128 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2360 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-19 14:50:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-19 14:50:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 425 states have (on average 1.6658823529411764) internal successors, (708), 445 states have internal predecessors, (708), 89 states have call successors, (89), 22 states have call predecessors, (89), 22 states have return successors, (85), 82 states have call predecessors, (85), 84 states have call successors, (85) [2021-11-19 14:50:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 882 transitions. [2021-11-19 14:50:37,400 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 882 transitions. Word has length 109 [2021-11-19 14:50:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:37,400 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 882 transitions. [2021-11-19 14:50:37,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 882 transitions. [2021-11-19 14:50:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:50:37,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:37,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:37,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:37,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1474622438, now seen corresponding path program 1 times [2021-11-19 14:50:37,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:37,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449093884] [2021-11-19 14:50:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:37,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:37,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:37,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:37,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:50:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:38,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:38,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449093884] [2021-11-19 14:50:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449093884] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:38,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:38,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:38,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276249969] [2021-11-19 14:50:38,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:38,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:38,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:38,484 INFO L87 Difference]: Start difference. First operand 537 states and 882 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:38,673 INFO L93 Difference]: Finished difference Result 1103 states and 1823 transitions. [2021-11-19 14:50:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-11-19 14:50:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:38,680 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 14:50:38,681 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:50:38,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:38,684 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 143 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:38,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2370 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:38,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:50:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 552. [2021-11-19 14:50:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 440 states have (on average 1.643181818181818) internal successors, (723), 459 states have internal predecessors, (723), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 896 transitions. [2021-11-19 14:50:38,713 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 896 transitions. Word has length 111 [2021-11-19 14:50:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:38,714 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 896 transitions. [2021-11-19 14:50:38,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 896 transitions. [2021-11-19 14:50:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:50:38,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:38,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:38,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:38,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:38,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1074440038, now seen corresponding path program 1 times [2021-11-19 14:50:38,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:38,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552374104] [2021-11-19 14:50:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:38,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:38,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:38,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:38,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:50:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:39,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:39,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552374104] [2021-11-19 14:50:39,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552374104] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:39,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:39,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:50:39,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099407835] [2021-11-19 14:50:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:39,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:39,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:39,954 INFO L87 Difference]: Start difference. First operand 552 states and 896 transitions. Second operand has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:40,132 INFO L93 Difference]: Finished difference Result 1067 states and 1744 transitions. [2021-11-19 14:50:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-11-19 14:50:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:40,139 INFO L225 Difference]: With dead ends: 1067 [2021-11-19 14:50:40,139 INFO L226 Difference]: Without dead ends: 546 [2021-11-19 14:50:40,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 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 14:50:40,146 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 131 mSDsluCounter, 4118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:40,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 4973 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-19 14:50:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 531. [2021-11-19 14:50:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6372315035799523) internal successors, (686), 438 states have internal predecessors, (686), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 859 transitions. [2021-11-19 14:50:40,169 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 859 transitions. Word has length 111 [2021-11-19 14:50:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:40,170 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 859 transitions. [2021-11-19 14:50:40,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 859 transitions. [2021-11-19 14:50:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:50:40,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:40,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:40,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:40,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:40,392 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash -709042707, now seen corresponding path program 1 times [2021-11-19 14:50:40,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:40,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720118489] [2021-11-19 14:50:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:40,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:40,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:40,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:40,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:50:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:40,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:41,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:41,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720118489] [2021-11-19 14:50:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720118489] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:41,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:41,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:41,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613549817] [2021-11-19 14:50:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:41,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:41,212 INFO L87 Difference]: Start difference. First operand 531 states and 859 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:41,322 INFO L93 Difference]: Finished difference Result 1031 states and 1682 transitions. [2021-11-19 14:50:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-19 14:50:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:41,328 INFO L225 Difference]: With dead ends: 1031 [2021-11-19 14:50:41,329 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:50:41,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:41,332 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 69 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:41,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2384 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:50:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:50:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6348448687350836) internal successors, (685), 438 states have internal predecessors, (685), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 858 transitions. [2021-11-19 14:50:41,355 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 858 transitions. Word has length 112 [2021-11-19 14:50:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:41,355 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 858 transitions. [2021-11-19 14:50:41,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 858 transitions. [2021-11-19 14:50:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:50:41,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:41,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:41,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:50:41,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:41,579 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2061438113, now seen corresponding path program 1 times [2021-11-19 14:50:41,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:41,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799614957] [2021-11-19 14:50:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:41,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:41,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:50:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:41,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:42,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:42,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:42,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799614957] [2021-11-19 14:50:42,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799614957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:42,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:42,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:42,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081129906] [2021-11-19 14:50:42,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:42,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:42,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:42,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:42,406 INFO L87 Difference]: Start difference. First operand 531 states and 858 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:42,513 INFO L93 Difference]: Finished difference Result 1031 states and 1681 transitions. [2021-11-19 14:50:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-11-19 14:50:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:42,519 INFO L225 Difference]: With dead ends: 1031 [2021-11-19 14:50:42,519 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:50:42,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:42,523 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 67 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:42,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2384 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:42,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:50:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:50:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.6324582338902147) internal successors, (684), 438 states have internal predecessors, (684), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 857 transitions. [2021-11-19 14:50:42,583 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 857 transitions. Word has length 113 [2021-11-19 14:50:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:42,584 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 857 transitions. [2021-11-19 14:50:42,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 857 transitions. [2021-11-19 14:50:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:50:42,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:42,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:42,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:42,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:42,799 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1912490246, now seen corresponding path program 1 times [2021-11-19 14:50:42,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:42,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919464552] [2021-11-19 14:50:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:42,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:42,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:42,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:42,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:50:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:43,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:43,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:43,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919464552] [2021-11-19 14:50:43,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919464552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:43,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:43,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:50:43,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502993016] [2021-11-19 14:50:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:43,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:43,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:50:43,606 INFO L87 Difference]: Start difference. First operand 531 states and 857 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:43,714 INFO L93 Difference]: Finished difference Result 1031 states and 1680 transitions. [2021-11-19 14:50:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-11-19 14:50:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:43,720 INFO L225 Difference]: With dead ends: 1031 [2021-11-19 14:50:43,721 INFO L226 Difference]: Without dead ends: 531 [2021-11-19 14:50:43,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 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 14:50:43,724 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 114 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:43,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 2354 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-19 14:50:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-11-19 14:50:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 419 states have (on average 1.630071599045346) internal successors, (683), 438 states have internal predecessors, (683), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 856 transitions. [2021-11-19 14:50:43,746 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 856 transitions. Word has length 114 [2021-11-19 14:50:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:43,746 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 856 transitions. [2021-11-19 14:50:43,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:50:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 856 transitions. [2021-11-19 14:50:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:50:43,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:43,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:43,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:43,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:43,969 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash -503346104, now seen corresponding path program 1 times [2021-11-19 14:50:43,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:43,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709082505] [2021-11-19 14:50:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:43,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:43,971 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:44,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:50:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:44,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:44,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:45,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:45,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709082505] [2021-11-19 14:50:45,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709082505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:45,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:45,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:50:45,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678914031] [2021-11-19 14:50:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:45,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:45,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:45,032 INFO L87 Difference]: Start difference. First operand 531 states and 856 transitions. Second operand has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:45,247 INFO L93 Difference]: Finished difference Result 1036 states and 1687 transitions. [2021-11-19 14:50:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2021-11-19 14:50:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:45,253 INFO L225 Difference]: With dead ends: 1036 [2021-11-19 14:50:45,253 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 14:50:45,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:45,257 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 108 mSDsluCounter, 4725 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 5523 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:45,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 5523 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 14:50:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 533. [2021-11-19 14:50:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 421 states have (on average 1.6247030878859858) internal successors, (684), 440 states have internal predecessors, (684), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 857 transitions. [2021-11-19 14:50:45,280 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 857 transitions. Word has length 114 [2021-11-19 14:50:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:45,280 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 857 transitions. [2021-11-19 14:50:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 857 transitions. [2021-11-19 14:50:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:50:45,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:45,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:45,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:45,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:45,503 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1974460044, now seen corresponding path program 1 times [2021-11-19 14:50:45,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:45,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163642332] [2021-11-19 14:50:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:45,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:45,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:45,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:45,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:50:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:46,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:46,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163642332] [2021-11-19 14:50:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163642332] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:46,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:46,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:50:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435893610] [2021-11-19 14:50:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:46,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:46,478 INFO L87 Difference]: Start difference. First operand 533 states and 857 transitions. Second operand has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:46,708 INFO L93 Difference]: Finished difference Result 1028 states and 1668 transitions. [2021-11-19 14:50:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:46,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-11-19 14:50:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:46,713 INFO L225 Difference]: With dead ends: 1028 [2021-11-19 14:50:46,714 INFO L226 Difference]: Without dead ends: 538 [2021-11-19 14:50:46,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:46,718 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 76 mSDsluCounter, 4731 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:46,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 5531 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-19 14:50:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 535. [2021-11-19 14:50:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 423 states have (on average 1.6193853427895981) internal successors, (685), 442 states have internal predecessors, (685), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 858 transitions. [2021-11-19 14:50:46,740 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 858 transitions. Word has length 115 [2021-11-19 14:50:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:46,741 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 858 transitions. [2021-11-19 14:50:46,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 14:50:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 858 transitions. [2021-11-19 14:50:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:50:46,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:46,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:46,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:46,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:46,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1728976658, now seen corresponding path program 1 times [2021-11-19 14:50:46,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:46,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132812528] [2021-11-19 14:50:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:46,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:46,962 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:46,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:50:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:47,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:47,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:47,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132812528] [2021-11-19 14:50:47,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132812528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:47,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:47,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:50:47,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656087246] [2021-11-19 14:50:47,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:47,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:50:47,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:50:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:47,921 INFO L87 Difference]: Start difference. First operand 535 states and 858 transitions. Second operand has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:48,110 INFO L93 Difference]: Finished difference Result 974 states and 1595 transitions. [2021-11-19 14:50:48,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:50:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 116 [2021-11-19 14:50:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:48,116 INFO L225 Difference]: With dead ends: 974 [2021-11-19 14:50:48,116 INFO L226 Difference]: Without dead ends: 528 [2021-11-19 14:50:48,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:48,120 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 107 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 5665 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:48,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 5665 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-19 14:50:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2021-11-19 14:50:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 416 states have (on average 1.6274038461538463) internal successors, (677), 435 states have internal predecessors, (677), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 850 transitions. [2021-11-19 14:50:48,142 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 850 transitions. Word has length 116 [2021-11-19 14:50:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:48,142 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 850 transitions. [2021-11-19 14:50:48,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 850 transitions. [2021-11-19 14:50:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:50:48,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:48,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:48,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:48,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -415763854, now seen corresponding path program 1 times [2021-11-19 14:50:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:48,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743864919] [2021-11-19 14:50:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:48,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:48,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:48,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:48,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:50:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:49,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:49,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743864919] [2021-11-19 14:50:49,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743864919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:49,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:49,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:50:49,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832056490] [2021-11-19 14:50:49,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:49,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:50:49,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:50:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:49,283 INFO L87 Difference]: Start difference. First operand 528 states and 850 transitions. Second operand has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:49,439 INFO L93 Difference]: Finished difference Result 979 states and 1609 transitions. [2021-11-19 14:50:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 117 [2021-11-19 14:50:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:49,445 INFO L225 Difference]: With dead ends: 979 [2021-11-19 14:50:49,445 INFO L226 Difference]: Without dead ends: 525 [2021-11-19 14:50:49,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:49,449 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 167 mSDsluCounter, 4003 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 4807 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:49,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 4807 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-19 14:50:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-11-19 14:50:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 413 states have (on average 1.6271186440677967) internal successors, (672), 432 states have internal predecessors, (672), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 845 transitions. [2021-11-19 14:50:49,471 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 845 transitions. Word has length 117 [2021-11-19 14:50:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:49,472 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 845 transitions. [2021-11-19 14:50:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 845 transitions. [2021-11-19 14:50:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:50:49,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:49,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:49,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:49,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:49,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 922439410, now seen corresponding path program 1 times [2021-11-19 14:50:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:49,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733918904] [2021-11-19 14:50:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:49,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:49,692 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:49,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:50:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:50,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:50,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:50,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:50,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733918904] [2021-11-19 14:50:50,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733918904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:50,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:50,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:50:50,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789541647] [2021-11-19 14:50:50,654 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:50,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:50,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:50,656 INFO L87 Difference]: Start difference. First operand 525 states and 845 transitions. Second operand has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:50:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:50,823 INFO L93 Difference]: Finished difference Result 976 states and 1604 transitions. [2021-11-19 14:50:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 117 [2021-11-19 14:50:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:50,831 INFO L225 Difference]: With dead ends: 976 [2021-11-19 14:50:50,831 INFO L226 Difference]: Without dead ends: 517 [2021-11-19 14:50:50,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:50,835 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 103 mSDsluCounter, 3954 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 4757 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:50,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 4757 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-19 14:50:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-11-19 14:50:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 405 states have (on average 1.6320987654320989) internal successors, (661), 424 states have internal predecessors, (661), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 834 transitions. [2021-11-19 14:50:50,865 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 834 transitions. Word has length 117 [2021-11-19 14:50:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:50,866 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 834 transitions. [2021-11-19 14:50:50,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-19 14:50:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 834 transitions. [2021-11-19 14:50:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:50:50,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:50,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:50,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:51,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:51,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -975548874, now seen corresponding path program 1 times [2021-11-19 14:50:51,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:51,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127213723] [2021-11-19 14:50:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:51,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:51,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:51,089 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:51,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:50:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:51,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:52,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:52,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127213723] [2021-11-19 14:50:52,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127213723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:52,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:52,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:52,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513961005] [2021-11-19 14:50:52,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:52,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:52,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:52,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:52,114 INFO L87 Difference]: Start difference. First operand 517 states and 834 transitions. Second operand has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:52,367 INFO L93 Difference]: Finished difference Result 962 states and 1582 transitions. [2021-11-19 14:50:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2021-11-19 14:50:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:52,373 INFO L225 Difference]: With dead ends: 962 [2021-11-19 14:50:52,373 INFO L226 Difference]: Without dead ends: 517 [2021-11-19 14:50:52,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:50:52,376 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 67 mSDsluCounter, 7836 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 8635 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 14:50:52,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 8635 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-19 14:50:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-11-19 14:50:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 405 states have (on average 1.6296296296296295) internal successors, (660), 424 states have internal predecessors, (660), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 833 transitions. [2021-11-19 14:50:52,397 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 833 transitions. Word has length 118 [2021-11-19 14:50:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:52,398 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 833 transitions. [2021-11-19 14:50:52,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 833 transitions. [2021-11-19 14:50:52,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:50:52,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:52,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:52,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:52,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:52,615 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:52,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1493237008, now seen corresponding path program 1 times [2021-11-19 14:50:52,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:52,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990931853] [2021-11-19 14:50:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:52,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:52,617 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:52,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:50:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:53,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:53,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:53,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990931853] [2021-11-19 14:50:53,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990931853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:53,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:53,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:53,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123079861] [2021-11-19 14:50:53,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:53,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:53,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:53,634 INFO L87 Difference]: Start difference. First operand 517 states and 833 transitions. Second operand has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:53,886 INFO L93 Difference]: Finished difference Result 1006 states and 1639 transitions. [2021-11-19 14:50:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 119 [2021-11-19 14:50:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:53,891 INFO L225 Difference]: With dead ends: 1006 [2021-11-19 14:50:53,892 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 14:50:53,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 227 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 14:50:53,895 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 100 mSDsluCounter, 7765 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 8552 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:53,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 8552 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 14:50:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-19 14:50:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 402 states have (on average 1.6218905472636815) internal successors, (652), 421 states have internal predecessors, (652), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 825 transitions. [2021-11-19 14:50:53,914 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 825 transitions. Word has length 119 [2021-11-19 14:50:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 825 transitions. [2021-11-19 14:50:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 825 transitions. [2021-11-19 14:50:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:50:53,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:53,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:53,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:54,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:54,127 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1504374149, now seen corresponding path program 1 times [2021-11-19 14:50:54,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:54,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123833183] [2021-11-19 14:50:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:54,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:54,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:54,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:50:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:54,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:54,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:55,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:55,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123833183] [2021-11-19 14:50:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123833183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:55,129 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:55,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:55,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805324707] [2021-11-19 14:50:55,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:55,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:55,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:55,131 INFO L87 Difference]: Start difference. First operand 514 states and 825 transitions. Second operand has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:55,318 INFO L93 Difference]: Finished difference Result 953 states and 1562 transitions. [2021-11-19 14:50:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 120 [2021-11-19 14:50:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:55,323 INFO L225 Difference]: With dead ends: 953 [2021-11-19 14:50:55,324 INFO L226 Difference]: Without dead ends: 514 [2021-11-19 14:50:55,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:50:55,327 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 98 mSDsluCounter, 4689 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:55,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 5477 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-19 14:50:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-19 14:50:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 402 states have (on average 1.6194029850746268) internal successors, (651), 421 states have internal predecessors, (651), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:55,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 824 transitions. [2021-11-19 14:50:55,346 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 824 transitions. Word has length 120 [2021-11-19 14:50:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:55,347 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 824 transitions. [2021-11-19 14:50:55,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.181818181818182) internal successors, (145), 11 states have internal predecessors, (145), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 824 transitions. [2021-11-19 14:50:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:50:55,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:55,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:55,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:55,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:55,568 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2142726719, now seen corresponding path program 1 times [2021-11-19 14:50:55,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:55,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993949025] [2021-11-19 14:50:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:55,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:55,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:55,570 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:50:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:56,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:56,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:56,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993949025] [2021-11-19 14:50:56,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993949025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:56,580 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:56,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:56,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829240276] [2021-11-19 14:50:56,581 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:56,583 INFO L87 Difference]: Start difference. First operand 514 states and 824 transitions. Second operand has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:56,792 INFO L93 Difference]: Finished difference Result 991 states and 1607 transitions. [2021-11-19 14:50:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 121 [2021-11-19 14:50:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:56,797 INFO L225 Difference]: With dead ends: 991 [2021-11-19 14:50:56,798 INFO L226 Difference]: Without dead ends: 511 [2021-11-19 14:50:56,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 230 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 14:50:56,801 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 93 mSDsluCounter, 5443 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6229 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:56,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 6229 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-19 14:50:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2021-11-19 14:50:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 399 states have (on average 1.6115288220551378) internal successors, (643), 418 states have internal predecessors, (643), 89 states have call successors, (89), 23 states have call predecessors, (89), 22 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-11-19 14:50:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 816 transitions. [2021-11-19 14:50:56,823 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 816 transitions. Word has length 121 [2021-11-19 14:50:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:56,824 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 816 transitions. [2021-11-19 14:50:56,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-19 14:50:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 816 transitions. [2021-11-19 14:50:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:50:56,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:56,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:56,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:57,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:57,042 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:57,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1284823680, now seen corresponding path program 1 times [2021-11-19 14:50:57,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:57,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222677510] [2021-11-19 14:50:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:57,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:57,043 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:57,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:50:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:50:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:50:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:50:58,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:58,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222677510] [2021-11-19 14:50:58,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222677510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:58,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:58,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:50:58,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847060354] [2021-11-19 14:50:58,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:58,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:50:58,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:58,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:50:58,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:50:58,606 INFO L87 Difference]: Start difference. First operand 511 states and 816 transitions. Second operand has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:51:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:02,384 INFO L93 Difference]: Finished difference Result 1079 states and 1797 transitions. [2021-11-19 14:51:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:51:02,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) Word has length 122 [2021-11-19 14:51:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:02,390 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 14:51:02,390 INFO L226 Difference]: Without dead ends: 648 [2021-11-19 14:51:02,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:51:02,394 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 1356 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 4806 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 4090 SdHoareTripleChecker+Invalid, 5338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 4806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:02,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 4090 Invalid, 5338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 4806 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:51:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-19 14:51:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 515. [2021-11-19 14:51:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 402 states have (on average 1.6069651741293531) internal successors, (646), 421 states have internal predecessors, (646), 89 states have call successors, (89), 23 states have call predecessors, (89), 23 states have return successors, (100), 83 states have call predecessors, (100), 84 states have call successors, (100) [2021-11-19 14:51:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 835 transitions. [2021-11-19 14:51:02,423 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 835 transitions. Word has length 122 [2021-11-19 14:51:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 835 transitions. [2021-11-19 14:51:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.928571428571429) internal successors, (153), 12 states have internal predecessors, (153), 6 states have call successors, (23), 5 states have call predecessors, (23), 8 states have return successors, (22), 8 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:51:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 835 transitions. [2021-11-19 14:51:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:51:02,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:02,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:02,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:02,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:02,643 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1463513597, now seen corresponding path program 1 times [2021-11-19 14:51:02,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:02,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873420389] [2021-11-19 14:51:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:02,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:02,645 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:02,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:51:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:51:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:03,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:03,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:03,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873420389] [2021-11-19 14:51:03,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873420389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:03,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:51:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566501696] [2021-11-19 14:51:03,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:51:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:51:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:03,730 INFO L87 Difference]: Start difference. First operand 515 states and 835 transitions. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:51:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:08,821 INFO L93 Difference]: Finished difference Result 1777 states and 3042 transitions. [2021-11-19 14:51:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:51:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) Word has length 123 [2021-11-19 14:51:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:08,837 INFO L225 Difference]: With dead ends: 1777 [2021-11-19 14:51:08,837 INFO L226 Difference]: Without dead ends: 1342 [2021-11-19 14:51:08,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:08,840 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 2692 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 5147 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2765 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 5927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 5147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:08,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2765 Valid, 4210 Invalid, 5927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 5147 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-19 14:51:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-19 14:51:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1254. [2021-11-19 14:51:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 972 states have (on average 1.6450617283950617) internal successors, (1599), 1020 states have internal predecessors, (1599), 226 states have call successors, (226), 54 states have call predecessors, (226), 55 states have return successors, (244), 216 states have call predecessors, (244), 221 states have call successors, (244) [2021-11-19 14:51:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 2069 transitions. [2021-11-19 14:51:08,910 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 2069 transitions. Word has length 123 [2021-11-19 14:51:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:08,910 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 2069 transitions. [2021-11-19 14:51:08,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-19 14:51:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 2069 transitions. [2021-11-19 14:51:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:51:08,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:08,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:08,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 14:51:09,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:09,130 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1298418039, now seen corresponding path program 1 times [2021-11-19 14:51:09,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:09,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551841191] [2021-11-19 14:51:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:09,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:09,132 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:09,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:51:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:51:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:09,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:10,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:10,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551841191] [2021-11-19 14:51:10,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551841191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:10,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:10,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:51:10,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276961374] [2021-11-19 14:51:10,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:10,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:51:10,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:51:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:10,219 INFO L87 Difference]: Start difference. First operand 1254 states and 2069 transitions. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:51:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:14,071 INFO L93 Difference]: Finished difference Result 3414 states and 5772 transitions. [2021-11-19 14:51:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:51:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 125 [2021-11-19 14:51:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:14,087 INFO L225 Difference]: With dead ends: 3414 [2021-11-19 14:51:14,087 INFO L226 Difference]: Without dead ends: 2536 [2021-11-19 14:51:14,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:14,092 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 2593 mSDsluCounter, 2065 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2664 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:14,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2664 Valid, 3041 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 4012 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:51:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-11-19 14:51:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2324. [2021-11-19 14:51:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 1803 states have (on average 1.6561286744315031) internal successors, (2986), 1896 states have internal predecessors, (2986), 410 states have call successors, (410), 94 states have call predecessors, (410), 110 states have return successors, (501), 395 states have call predecessors, (501), 405 states have call successors, (501) [2021-11-19 14:51:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3897 transitions. [2021-11-19 14:51:14,226 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3897 transitions. Word has length 125 [2021-11-19 14:51:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:14,226 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 3897 transitions. [2021-11-19 14:51:14,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-19 14:51:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3897 transitions. [2021-11-19 14:51:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:51:14,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:14,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:14,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:14,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:14,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1164159281, now seen corresponding path program 1 times [2021-11-19 14:51:14,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:14,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121722885] [2021-11-19 14:51:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:14,445 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:14,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:51:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:51:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:15,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:15,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:15,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121722885] [2021-11-19 14:51:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121722885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:15,962 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:15,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:51:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763358287] [2021-11-19 14:51:15,963 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:15,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:51:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:51:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:51:15,965 INFO L87 Difference]: Start difference. First operand 2324 states and 3897 transitions. Second operand has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 14:51:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:22,993 INFO L93 Difference]: Finished difference Result 6245 states and 10568 transitions. [2021-11-19 14:51:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:51:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) Word has length 130 [2021-11-19 14:51:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:23,014 INFO L225 Difference]: With dead ends: 6245 [2021-11-19 14:51:23,014 INFO L226 Difference]: Without dead ends: 4247 [2021-11-19 14:51:23,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:51:23,025 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 4111 mSDsluCounter, 3051 mSDsCounter, 0 mSdLazyCounter, 7324 mSolverCounterSat, 1144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4182 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 8468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 7324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:23,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4182 Valid, 3975 Invalid, 8468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1144 Valid, 7324 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 14:51:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-11-19 14:51:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4085. [2021-11-19 14:51:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3157 states have (on average 1.6499841621792841) internal successors, (5209), 3317 states have internal predecessors, (5209), 728 states have call successors, (728), 170 states have call predecessors, (728), 199 states have return successors, (902), 705 states have call predecessors, (902), 723 states have call successors, (902) [2021-11-19 14:51:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6839 transitions. [2021-11-19 14:51:23,288 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6839 transitions. Word has length 130 [2021-11-19 14:51:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:23,288 INFO L470 AbstractCegarLoop]: Abstraction has 4085 states and 6839 transitions. [2021-11-19 14:51:23,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.142857142857142) internal successors, (156), 12 states have internal predecessors, (156), 7 states have call successors, (23), 5 states have call predecessors, (23), 6 states have return successors, (23), 9 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-19 14:51:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6839 transitions. [2021-11-19 14:51:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:51:23,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:23,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:23,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:23,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:23,507 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1274589005, now seen corresponding path program 1 times [2021-11-19 14:51:23,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:23,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432742641] [2021-11-19 14:51:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:23,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:23,510 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:23,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:51:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:51:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:24,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:51:24,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:24,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432742641] [2021-11-19 14:51:24,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432742641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:24,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:24,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:51:24,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740731629] [2021-11-19 14:51:24,355 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:24,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:51:24,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:51:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:51:24,357 INFO L87 Difference]: Start difference. First operand 4085 states and 6839 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:51:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:24,582 INFO L93 Difference]: Finished difference Result 8110 states and 13751 transitions. [2021-11-19 14:51:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:51:24,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 137 [2021-11-19 14:51:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:24,607 INFO L225 Difference]: With dead ends: 8110 [2021-11-19 14:51:24,607 INFO L226 Difference]: Without dead ends: 4085 [2021-11-19 14:51:24,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:51:24,622 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 310 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2251 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 2251 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:51:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-19 14:51:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 4085. [2021-11-19 14:51:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 3157 states have (on average 1.6303452644916059) internal successors, (5147), 3317 states have internal predecessors, (5147), 728 states have call successors, (728), 170 states have call predecessors, (728), 199 states have return successors, (902), 705 states have call predecessors, (902), 723 states have call successors, (902) [2021-11-19 14:51:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 6777 transitions. [2021-11-19 14:51:24,930 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 6777 transitions. Word has length 137 [2021-11-19 14:51:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:24,931 INFO L470 AbstractCegarLoop]: Abstraction has 4085 states and 6777 transitions. [2021-11-19 14:51:24,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-19 14:51:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 6777 transitions. [2021-11-19 14:51:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 14:51:24,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:24,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:24,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-19 14:51:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:25,153 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash 490976588, now seen corresponding path program 1 times [2021-11-19 14:51:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:25,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42831569] [2021-11-19 14:51:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:25,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:25,155 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:25,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:51:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:51:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:51:25,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:51:26,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:26,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42831569] [2021-11-19 14:51:26,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42831569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:26,171 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:26,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:51:26,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389854038] [2021-11-19 14:51:26,172 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:26,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:51:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:51:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:26,173 INFO L87 Difference]: Start difference. First operand 4085 states and 6777 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:51:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:29,136 INFO L93 Difference]: Finished difference Result 8199 states and 13670 transitions. [2021-11-19 14:51:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:51:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 142 [2021-11-19 14:51:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:29,162 INFO L225 Difference]: With dead ends: 8199 [2021-11-19 14:51:29,162 INFO L226 Difference]: Without dead ends: 4547 [2021-11-19 14:51:29,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:51:29,174 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 1973 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2047 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 3803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:29,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2047 Valid, 2468 Invalid, 3803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:51:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-11-19 14:51:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4265. [2021-11-19 14:51:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 3293 states have (on average 1.6182812025508655) internal successors, (5329), 3463 states have internal predecessors, (5329), 747 states have call successors, (747), 186 states have call predecessors, (747), 224 states have return successors, (945), 723 states have call predecessors, (945), 742 states have call successors, (945) [2021-11-19 14:51:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 7021 transitions. [2021-11-19 14:51:29,478 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 7021 transitions. Word has length 142 [2021-11-19 14:51:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:29,479 INFO L470 AbstractCegarLoop]: Abstraction has 4265 states and 7021 transitions. [2021-11-19 14:51:29,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 9 states have internal predecessors, (156), 5 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:51:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 7021 transitions. [2021-11-19 14:51:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:51:29,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:29,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:29,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:29,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:29,696 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash -794296512, now seen corresponding path program 1 times [2021-11-19 14:51:29,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:29,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391084122] [2021-11-19 14:51:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:29,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:29,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:29,698 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:29,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:51:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:51:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:30,491 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 14:51:30,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:31,160 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 14:51:31,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:31,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391084122] [2021-11-19 14:51:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391084122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:31,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:31,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:51:31,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577348692] [2021-11-19 14:51:31,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:31,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:51:31,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:51:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:51:31,163 INFO L87 Difference]: Start difference. First operand 4265 states and 7021 transitions. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:51:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:36,548 INFO L93 Difference]: Finished difference Result 10766 states and 18081 transitions. [2021-11-19 14:51:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:51:36,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-19 14:51:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:36,588 INFO L225 Difference]: With dead ends: 10766 [2021-11-19 14:51:36,588 INFO L226 Difference]: Without dead ends: 6381 [2021-11-19 14:51:36,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:36,607 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 3246 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 5646 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3337 SdHoareTripleChecker+Valid, 3729 SdHoareTripleChecker+Invalid, 6549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 5646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:36,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3337 Valid, 3729 Invalid, 6549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 5646 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 14:51:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6381 states. [2021-11-19 14:51:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6381 to 6092. [2021-11-19 14:51:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6092 states, 4694 states have (on average 1.6131231359181935) internal successors, (7572), 4946 states have internal predecessors, (7572), 1080 states have call successors, (1080), 273 states have call predecessors, (1080), 317 states have return successors, (1420), 1028 states have call predecessors, (1420), 1075 states have call successors, (1420) [2021-11-19 14:51:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 10072 transitions. [2021-11-19 14:51:37,009 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 10072 transitions. Word has length 147 [2021-11-19 14:51:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:37,010 INFO L470 AbstractCegarLoop]: Abstraction has 6092 states and 10072 transitions. [2021-11-19 14:51:37,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 5 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:51:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 10072 transitions. [2021-11-19 14:51:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:51:37,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:37,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:37,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:37,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:37,227 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1829245956, now seen corresponding path program 1 times [2021-11-19 14:51:37,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:37,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511912269] [2021-11-19 14:51:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:37,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:37,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:37,229 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:37,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:51:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:51:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:51:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:51:38,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:38,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511912269] [2021-11-19 14:51:38,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511912269] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:38,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:38,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:51:38,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116668628] [2021-11-19 14:51:38,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:38,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:51:38,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:51:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:51:38,778 INFO L87 Difference]: Start difference. First operand 6092 states and 10072 transitions. Second operand has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:51:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:43,621 INFO L93 Difference]: Finished difference Result 16241 states and 27184 transitions. [2021-11-19 14:51:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:51:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) Word has length 147 [2021-11-19 14:51:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:43,685 INFO L225 Difference]: With dead ends: 16241 [2021-11-19 14:51:43,685 INFO L226 Difference]: Without dead ends: 10581 [2021-11-19 14:51:43,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:51:43,715 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 4406 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 1283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4475 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 5940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1283 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:43,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4475 Valid, 2723 Invalid, 5940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1283 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 14:51:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10581 states. [2021-11-19 14:51:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10581 to 10517. [2021-11-19 14:51:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10517 states, 8097 states have (on average 1.6278868716808694) internal successors, (13181), 8513 states have internal predecessors, (13181), 1904 states have call successors, (1904), 492 states have call predecessors, (1904), 515 states have return successors, (2349), 1811 states have call predecessors, (2349), 1899 states have call successors, (2349) [2021-11-19 14:51:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10517 states to 10517 states and 17434 transitions. [2021-11-19 14:51:44,417 INFO L78 Accepts]: Start accepts. Automaton has 10517 states and 17434 transitions. Word has length 147 [2021-11-19 14:51:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 10517 states and 17434 transitions. [2021-11-19 14:51:44,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.153846153846153) internal successors, (171), 11 states have internal predecessors, (171), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 9 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:51:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10517 states and 17434 transitions. [2021-11-19 14:51:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:51:44,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:44,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:44,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:44,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:44,640 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:44,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:44,640 INFO L85 PathProgramCache]: Analyzing trace with hash -947725029, now seen corresponding path program 1 times [2021-11-19 14:51:44,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:44,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073775952] [2021-11-19 14:51:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:44,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:44,641 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:51:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:51:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:45,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:45,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:45,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073775952] [2021-11-19 14:51:45,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073775952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:45,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [562315229] [2021-11-19 14:51:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:45,814 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:45,816 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 14:51:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:46,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:51:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:46,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:46,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [562315229] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:46,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298483174] [2021-11-19 14:51:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:46,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:51:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:51:46,864 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:51:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 14:51:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:51:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:47,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:51:47,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298483174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:47,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:51:47,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 9 [2021-11-19 14:51:47,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109681128] [2021-11-19 14:51:47,826 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:51:47,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:51:47,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:51:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:47,828 INFO L87 Difference]: Start difference. First operand 10517 states and 17434 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:51:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:51,947 INFO L93 Difference]: Finished difference Result 42192 states and 70622 transitions. [2021-11-19 14:51:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:51:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) Word has length 148 [2021-11-19 14:51:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:52,129 INFO L225 Difference]: With dead ends: 42192 [2021-11-19 14:51:52,130 INFO L226 Difference]: Without dead ends: 31753 [2021-11-19 14:51:52,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:51:52,173 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 2150 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3447 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 4063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 3447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:52,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2226 Valid, 2441 Invalid, 4063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 3447 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:51:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31753 states. [2021-11-19 14:51:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31753 to 31603. [2021-11-19 14:51:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31603 states, 24335 states have (on average 1.6266694062050544) internal successors, (39585), 25611 states have internal predecessors, (39585), 5696 states have call successors, (5696), 1469 states have call predecessors, (5696), 1571 states have return successors, (7445), 5422 states have call predecessors, (7445), 5691 states have call successors, (7445) [2021-11-19 14:51:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31603 states to 31603 states and 52726 transitions. [2021-11-19 14:51:54,136 INFO L78 Accepts]: Start accepts. Automaton has 31603 states and 52726 transitions. Word has length 148 [2021-11-19 14:51:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:54,137 INFO L470 AbstractCegarLoop]: Abstraction has 31603 states and 52726 transitions. [2021-11-19 14:51:54,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 6 states have call successors, (23), 4 states have call predecessors, (23), 7 states have return successors, (24), 8 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:51:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 31603 states and 52726 transitions. [2021-11-19 14:51:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:51:54,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:54,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:54,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:54,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:54,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:54,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:51:54,762 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash 400828354, now seen corresponding path program 1 times [2021-11-19 14:51:54,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:54,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409464388] [2021-11-19 14:51:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:54,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:54,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:54,766 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:54,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:51:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:55,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:51:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:51:55,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:55,738 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 14:51:55,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:55,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409464388] [2021-11-19 14:51:55,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409464388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:55,738 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:55,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:51:55,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759659935] [2021-11-19 14:51:55,739 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:55,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:51:55,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:51:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:51:55,740 INFO L87 Difference]: Start difference. First operand 31603 states and 52726 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:51:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:58,493 INFO L93 Difference]: Finished difference Result 76604 states and 128295 transitions. [2021-11-19 14:51:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:51:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2021-11-19 14:51:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:58,938 INFO L225 Difference]: With dead ends: 76604 [2021-11-19 14:51:58,938 INFO L226 Difference]: Without dead ends: 46143 [2021-11-19 14:51:59,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:59,044 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 463 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:59,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 4278 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:51:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46143 states. [2021-11-19 14:52:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46143 to 45333. [2021-11-19 14:52:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45333 states, 35100 states have (on average 1.5788034188034188) internal successors, (55416), 36635 states have internal predecessors, (55416), 7717 states have call successors, (7717), 2330 states have call predecessors, (7717), 2515 states have return successors, (11696), 7267 states have call predecessors, (11696), 7712 states have call successors, (11696) [2021-11-19 14:52:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45333 states to 45333 states and 74829 transitions. [2021-11-19 14:52:02,138 INFO L78 Accepts]: Start accepts. Automaton has 45333 states and 74829 transitions. Word has length 151 [2021-11-19 14:52:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:02,138 INFO L470 AbstractCegarLoop]: Abstraction has 45333 states and 74829 transitions. [2021-11-19 14:52:02,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 14:52:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45333 states and 74829 transitions. [2021-11-19 14:52:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 14:52:02,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:02,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:02,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:02,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:02,359 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1080100608, now seen corresponding path program 1 times [2021-11-19 14:52:02,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:02,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131979571] [2021-11-19 14:52:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:02,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:02,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:02,361 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:02,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:52:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:52:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:52:03,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:03,799 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 14:52:03,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:03,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131979571] [2021-11-19 14:52:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131979571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:03,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-19 14:52:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078998607] [2021-11-19 14:52:03,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:52:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:52:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:52:03,801 INFO L87 Difference]: Start difference. First operand 45333 states and 74829 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-19 14:52:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:09,082 INFO L93 Difference]: Finished difference Result 91547 states and 153668 transitions. [2021-11-19 14:52:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) Word has length 151 [2021-11-19 14:52:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:09,342 INFO L225 Difference]: With dead ends: 91547 [2021-11-19 14:52:09,342 INFO L226 Difference]: Without dead ends: 47359 [2021-11-19 14:52:09,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:52:09,607 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 2044 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:09,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 2250 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:52:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47359 states. [2021-11-19 14:52:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47359 to 34975. [2021-11-19 14:52:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34975 states, 26205 states have (on average 1.5571837435603892) internal successors, (40806), 27736 states have internal predecessors, (40806), 7117 states have call successors, (7117), 1361 states have call predecessors, (7117), 1652 states have return successors, (10255), 6777 states have call predecessors, (10255), 7112 states have call successors, (10255) [2021-11-19 14:52:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34975 states to 34975 states and 58178 transitions. [2021-11-19 14:52:12,447 INFO L78 Accepts]: Start accepts. Automaton has 34975 states and 58178 transitions. Word has length 151 [2021-11-19 14:52:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:12,451 INFO L470 AbstractCegarLoop]: Abstraction has 34975 states and 58178 transitions. [2021-11-19 14:52:12,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2021-11-19 14:52:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34975 states and 58178 transitions. [2021-11-19 14:52:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:52:12,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:12,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:12,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:12,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:12,671 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1591786570, now seen corresponding path program 1 times [2021-11-19 14:52:12,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:12,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495511693] [2021-11-19 14:52:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:12,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:12,674 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 14:52:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:52:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:13,392 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 14:52:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:13,783 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 14:52:13,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:13,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495511693] [2021-11-19 14:52:13,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495511693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:13,783 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:13,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-19 14:52:13,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781360941] [2021-11-19 14:52:13,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:13,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:52:13,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:52:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:52:13,785 INFO L87 Difference]: Start difference. First operand 34975 states and 58178 transitions. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 14:52:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:17,111 INFO L93 Difference]: Finished difference Result 35485 states and 59123 transitions. [2021-11-19 14:52:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) Word has length 154 [2021-11-19 14:52:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:17,253 INFO L225 Difference]: With dead ends: 35485 [2021-11-19 14:52:17,253 INFO L226 Difference]: Without dead ends: 35465 [2021-11-19 14:52:17,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:52:17,274 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 1047 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:17,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 2631 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:52:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-11-19 14:52:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 35112. [2021-11-19 14:52:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35112 states, 26321 states have (on average 1.5560958930131834) internal successors, (40958), 27844 states have internal predecessors, (40958), 7138 states have call successors, (7138), 1361 states have call predecessors, (7138), 1652 states have return successors, (10292), 6806 states have call predecessors, (10292), 7133 states have call successors, (10292) [2021-11-19 14:52:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35112 states to 35112 states and 58388 transitions. [2021-11-19 14:52:19,787 INFO L78 Accepts]: Start accepts. Automaton has 35112 states and 58388 transitions. Word has length 154 [2021-11-19 14:52:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:19,787 INFO L470 AbstractCegarLoop]: Abstraction has 35112 states and 58388 transitions. [2021-11-19 14:52:19,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 4 states have call successors, (31), 3 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 14:52:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35112 states and 58388 transitions. [2021-11-19 14:52:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-19 14:52:19,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:19,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:19,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:20,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:20,011 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1510951793, now seen corresponding path program 1 times [2021-11-19 14:52:20,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:20,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421266399] [2021-11-19 14:52:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:20,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:20,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:20,013 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:20,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:52:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:52:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:20,603 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 14:52:20,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:20,921 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 14:52:20,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:20,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421266399] [2021-11-19 14:52:20,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421266399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:20,923 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:20,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:52:20,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670167710] [2021-11-19 14:52:20,923 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:52:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:52:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:52:20,925 INFO L87 Difference]: Start difference. First operand 35112 states and 58388 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:52:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:22,852 INFO L93 Difference]: Finished difference Result 35132 states and 58412 transitions. [2021-11-19 14:52:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:52:22,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) Word has length 160 [2021-11-19 14:52:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:22,980 INFO L225 Difference]: With dead ends: 35132 [2021-11-19 14:52:22,980 INFO L226 Difference]: Without dead ends: 35112 [2021-11-19 14:52:22,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:52:22,998 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 37 mSDsluCounter, 3881 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:22,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 4676 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:52:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35112 states. [2021-11-19 14:52:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35112 to 35112. [2021-11-19 14:52:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35112 states, 26321 states have (on average 1.5524486151741954) internal successors, (40862), 27844 states have internal predecessors, (40862), 7138 states have call successors, (7138), 1361 states have call predecessors, (7138), 1652 states have return successors, (10292), 6806 states have call predecessors, (10292), 7133 states have call successors, (10292) [2021-11-19 14:52:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35112 states to 35112 states and 58292 transitions. [2021-11-19 14:52:25,575 INFO L78 Accepts]: Start accepts. Automaton has 35112 states and 58292 transitions. Word has length 160 [2021-11-19 14:52:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:25,576 INFO L470 AbstractCegarLoop]: Abstraction has 35112 states and 58292 transitions. [2021-11-19 14:52:25,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 6 states have internal predecessors, (115), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:52:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 35112 states and 58292 transitions. [2021-11-19 14:52:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:52:25,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:25,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:25,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:25,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:25,795 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 730030155, now seen corresponding path program 1 times [2021-11-19 14:52:25,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:25,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817129851] [2021-11-19 14:52:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:25,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:25,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:25,797 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:25,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b86f44-af4d-43b1-a410-b77b0f1f3478/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:52:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:52:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:52:26,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:52:27,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:27,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817129851] [2021-11-19 14:52:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817129851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:27,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:52:27,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849310137] [2021-11-19 14:52:27,328 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:52:27,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:52:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:27,330 INFO L87 Difference]: Start difference. First operand 35112 states and 58292 transitions. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 11 states have internal predecessors, (190), 5 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 4 states have call successors, (31) [2021-11-19 14:52:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:32,316 INFO L93 Difference]: Finished difference Result 70180 states and 116670 transitions. [2021-11-19 14:52:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 11 states have internal predecessors, (190), 5 states have call successors, (32), 4 states have call predecessors, (32), 7 states have return successors, (31), 7 states have call predecessors, (31), 4 states have call successors, (31) Word has length 171 [2021-11-19 14:52:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:32,533 INFO L225 Difference]: With dead ends: 70180 [2021-11-19 14:52:32,533 INFO L226 Difference]: Without dead ends: 35232 [2021-11-19 14:52:32,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:52:32,656 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1165 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 3018 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 3347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:32,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 2584 Invalid, 3347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:52:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35232 states.