./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF --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 b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:03:44,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:03:44,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:03:44,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:03:44,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:03:44,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:03:44,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:03:44,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:03:44,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:03:44,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:03:44,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:03:44,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:03:44,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:03:44,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:03:44,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:03:44,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:03:44,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:03:44,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:03:44,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:03:44,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:03:44,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:03:44,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:03:44,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:03:44,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:03:44,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:03:44,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:03:44,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:03:44,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:03:44,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:03:44,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:03:44,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:03:44,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:03:44,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:03:44,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:03:44,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:03:44,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:03:44,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:03:44,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:03:44,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:03:44,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:03:44,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:03:44,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:03:44,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:03:44,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:03:44,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:03:44,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:03:44,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:03:44,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:03:44,593 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:03:44,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:03:44,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:03:44,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:03:44,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:03:44,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:03:44,601 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:03:44,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:03:44,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:03:44,602 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:03:44,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:03:44,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:03:44,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:03:44,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:03:44,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:03:44,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:03:44,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:03:44,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:03:44,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:03:44,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:03:44,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:03:44,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:03:44,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:03:44,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:03:44,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:03:44,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:44,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:03:44,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:03:44,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:03:44,608 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:03:44,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:03:44,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:03:44,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:03:44,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:03:44,609 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2021-11-12 23:03:44,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:03:44,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:03:44,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:03:44,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:03:44,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:03:44,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-12 23:03:44,961 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/3251fe704/83c98ff614e84d578de366cf75827f07/FLAG377419fd3 [2021-11-12 23:03:45,576 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:03:45,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-12 23:03:45,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/3251fe704/83c98ff614e84d578de366cf75827f07/FLAG377419fd3 [2021-11-12 23:03:45,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/3251fe704/83c98ff614e84d578de366cf75827f07 [2021-11-12 23:03:45,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:03:45,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:03:45,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:45,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:03:45,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:03:45,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:45" (1/1) ... [2021-11-12 23:03:45,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309e4c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:45, skipping insertion in model container [2021-11-12 23:03:45,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:45" (1/1) ... [2021-11-12 23:03:45,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:03:45,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:46,208 WARN L228 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-12 23:03:46,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:46,517 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) [2021-11-12 23:03:46,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ef5d611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:46, skipping insertion in model container [2021-11-12 23:03:46,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:46,521 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:03:46,523 INFO L158 Benchmark]: Toolchain (without parser) took 703.08ms. Allocated memory is still 130.0MB. Free memory was 99.2MB in the beginning and 89.4MB in the end (delta: 9.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:03:46,524 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 130.0MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:03:46,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 686.24ms. Allocated memory is still 130.0MB. Free memory was 99.0MB in the beginning and 89.8MB in the end (delta: 9.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:03:46,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 130.0MB. Free memory is still 82.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 686.24ms. Allocated memory is still 130.0MB. Free memory was 99.0MB in the beginning and 89.8MB in the end (delta: 9.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3141]: 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF --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 b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:03:48,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:03:48,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:03:48,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:03:48,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:03:48,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:03:48,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:03:48,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:03:48,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:03:48,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:03:48,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:03:48,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:03:48,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:03:48,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:03:48,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:03:48,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:03:48,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:03:48,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:03:48,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:03:48,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:03:48,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:03:48,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:03:48,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:03:48,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:03:48,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:03:48,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:03:48,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:03:48,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:03:48,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:03:48,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:03:48,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:03:48,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:03:48,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:03:48,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:03:48,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:03:48,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:03:48,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:03:48,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:03:48,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:03:48,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:03:48,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:03:48,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:03:48,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:03:48,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:03:48,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:03:48,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:03:48,866 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:03:48,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:03:48,866 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:03:48,866 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:03:48,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:03:48,867 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:03:48,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:03:48,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:03:48,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:03:48,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:03:48,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:03:48,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:03:48,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:03:48,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:03:48,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:03:48,870 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:03:48,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:03:48,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:03:48,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:03:48,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:03:48,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:03:48,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:03:48,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:03:48,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:48,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:03:48,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:03:48,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:03:48,873 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:03:48,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:48,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:03:48,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:03:48,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:03:48,880 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2021-11-12 23:03:49,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:03:49,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:03:49,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:03:49,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:03:49,287 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:03:49,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-12 23:03:49,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/b73d9faa7/41ae01de43224c5d8396a423e2d7a841/FLAG8ead2e85d [2021-11-12 23:03:50,095 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:03:50,095 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-12 23:03:50,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/b73d9faa7/41ae01de43224c5d8396a423e2d7a841/FLAG8ead2e85d [2021-11-12 23:03:50,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/data/b73d9faa7/41ae01de43224c5d8396a423e2d7a841 [2021-11-12 23:03:50,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:03:50,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:03:50,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:50,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:03:50,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:03:50,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:50" (1/1) ... [2021-11-12 23:03:50,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505e3946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:50, skipping insertion in model container [2021-11-12 23:03:50,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:50" (1/1) ... [2021-11-12 23:03:50,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:03:50,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:50,781 WARN L228 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-12 23:03:51,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:51,156 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:03:51,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:51,207 WARN L228 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-12 23:03:51,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:51,347 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:03:51,382 WARN L228 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_09ef3da1-f9cc-4831-a288-67d2ddaab595/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-12 23:03:51,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:51,487 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:03:51,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51 WrapperNode [2021-11-12 23:03:51,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:51,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:03:51,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:03:51,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:03:51,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:03:51,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:03:51,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:03:51,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:03:51,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:03:51,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:03:51,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:03:51,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:03:51,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (1/1) ... [2021-11-12 23:03:51,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:03:51,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:03:51,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:03:51,870 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:03:51,871 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:03:51,871 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:03:51,871 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:03:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:03:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:03:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:03:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:03:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:03:51,872 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:03:51,872 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:03:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:03:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:03:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:03:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:03:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:03:51,873 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:03:51,873 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:03:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:03:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:03:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:03:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:03:51,874 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:03:51,874 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:03:51,875 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:03:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:03:51,875 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:03:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:03:51,875 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:03:51,876 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:03:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:03:51,876 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:03:51,876 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:03:51,876 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:03:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:03:51,877 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:03:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:03:51,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:03:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:03:51,877 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:03:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:03:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:03:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:03:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:03:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:03:51,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:03:51,879 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:03:51,880 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:03:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:03:51,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:03:51,882 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:03:51,882 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:03:55,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:03:55,933 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:03:55,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:03:55 BoogieIcfgContainer [2021-11-12 23:03:55,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:03:55,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:03:55,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:03:55,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:03:55,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:03:50" (1/3) ... [2021-11-12 23:03:55,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e882f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:03:55, skipping insertion in model container [2021-11-12 23:03:55,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:51" (2/3) ... [2021-11-12 23:03:55,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e882f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:03:55, skipping insertion in model container [2021-11-12 23:03:55,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:03:55" (3/3) ... [2021-11-12 23:03:55,948 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2021-11-12 23:03:55,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:03:55,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:03:56,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:03:56,024 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 [2021-11-12 23:03:56,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:03:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 581 states, 456 states have (on average 1.6929824561403508) internal successors, (772), 479 states have internal predecessors, (772), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 23:03:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 23:03:56,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:56,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:56,085 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1129781487, now seen corresponding path program 1 times [2021-11-12 23:03:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:56,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770123698] [2021-11-12 23:03:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:56,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:56,107 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:56,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:03:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:56,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:03:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:03:56,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:03:57,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:57,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770123698] [2021-11-12 23:03:57,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770123698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:57,095 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:57,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:03:57,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287709644] [2021-11-12 23:03:57,098 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:57,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:03:57,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:03:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:03:57,143 INFO L87 Difference]: Start difference. First operand has 581 states, 456 states have (on average 1.6929824561403508) internal successors, (772), 479 states have internal predecessors, (772), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:03:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:57,250 INFO L93 Difference]: Finished difference Result 602 states and 998 transitions. [2021-11-12 23:03:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:03:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2021-11-12 23:03:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:57,280 INFO L225 Difference]: With dead ends: 602 [2021-11-12 23:03:57,281 INFO L226 Difference]: Without dead ends: 573 [2021-11-12 23:03:57,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:03:57,293 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:57,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 11.35ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:03:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-12 23:03:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-12 23:03:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 450 states have (on average 1.691111111111111) internal successors, (761), 471 states have internal predecessors, (761), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:03:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 952 transitions. [2021-11-12 23:03:57,424 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 952 transitions. Word has length 60 [2021-11-12 23:03:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:57,426 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 952 transitions. [2021-11-12 23:03:57,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-12 23:03:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 952 transitions. [2021-11-12 23:03:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 23:03:57,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:57,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:57,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:57,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:57,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash 861104163, now seen corresponding path program 1 times [2021-11-12 23:03:57,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:57,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292708394] [2021-11-12 23:03:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:57,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:57,649 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:57,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:03:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:03:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:03:58,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:03:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:03:58,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:03:58,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292708394] [2021-11-12 23:03:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292708394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:03:58,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:03:58,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:03:58,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943499139] [2021-11-12 23:03:58,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:03:58,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:03:58,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:03:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:03:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:03:58,629 INFO L87 Difference]: Start difference. First operand 573 states and 952 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:03:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:03:58,808 INFO L93 Difference]: Finished difference Result 1130 states and 1882 transitions. [2021-11-12 23:03:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:03:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-12 23:03:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:03:58,818 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:03:58,818 INFO L226 Difference]: Without dead ends: 573 [2021-11-12 23:03:58,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:03:58,827 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 15 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.00ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:03:58,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 2813 Invalid, 41 Unknown, 0 Unchecked, 24.00ms Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 42.21ms Time] [2021-11-12 23:03:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-12 23:03:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-12 23:03:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 450 states have (on average 1.6777777777777778) internal successors, (755), 471 states have internal predecessors, (755), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:03:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 946 transitions. [2021-11-12 23:03:58,879 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 946 transitions. Word has length 62 [2021-11-12 23:03:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:03:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 946 transitions. [2021-11-12 23:03:58,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:03:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 946 transitions. [2021-11-12 23:03:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:03:58,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:03:58,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:03:58,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:03:59,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:03:59,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:03:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:03:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash 120137632, now seen corresponding path program 1 times [2021-11-12 23:03:59,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:03:59,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793236797] [2021-11-12 23:03:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:03:59,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:03:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:03:59,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:03:59,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:03:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:03:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:03:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:03:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:03:59,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:00,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:00,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793236797] [2021-11-12 23:04:00,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793236797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:00,169 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:00,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:04:00,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933844137] [2021-11-12 23:04:00,170 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:00,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:00,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:00,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:00,172 INFO L87 Difference]: Start difference. First operand 573 states and 946 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:04:00,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:00,344 INFO L93 Difference]: Finished difference Result 1088 states and 1799 transitions. [2021-11-12 23:04:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 23:04:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:00,351 INFO L225 Difference]: With dead ends: 1088 [2021-11-12 23:04:00,351 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 23:04:00,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:04:00,355 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 194 mSDsluCounter, 4572 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 5505 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:00,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 5505 Invalid, 69 Unknown, 0 Unchecked, 14.05ms Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 86.03ms Time] [2021-11-12 23:04:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 23:04:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-12 23:04:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 444 states have (on average 1.6711711711711712) internal successors, (742), 465 states have internal predecessors, (742), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:04:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 933 transitions. [2021-11-12 23:04:00,385 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 933 transitions. Word has length 67 [2021-11-12 23:04:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:00,385 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 933 transitions. [2021-11-12 23:04:00,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:04:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 933 transitions. [2021-11-12 23:04:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:04:00,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:00,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:00,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:00,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:00,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 331338868, now seen corresponding path program 1 times [2021-11-12 23:04:00,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:00,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566720470] [2021-11-12 23:04:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:00,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:00,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:00,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:04:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:01,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:01,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:01,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566720470] [2021-11-12 23:04:01,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566720470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:01,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:01,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:04:01,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72198372] [2021-11-12 23:04:01,527 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:04:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:04:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:01,530 INFO L87 Difference]: Start difference. First operand 567 states and 933 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:04:01,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:01,745 INFO L93 Difference]: Finished difference Result 1091 states and 1800 transitions. [2021-11-12 23:04:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:01,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-12 23:04:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:01,752 INFO L225 Difference]: With dead ends: 1091 [2021-11-12 23:04:01,752 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 23:04:01,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:01,757 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 165 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.63ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:01,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 3508 Invalid, 148 Unknown, 0 Unchecked, 8.63ms Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 152.00ms Time] [2021-11-12 23:04:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 23:04:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-12 23:04:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 444 states have (on average 1.617117117117117) internal successors, (718), 465 states have internal predecessors, (718), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:04:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 909 transitions. [2021-11-12 23:04:01,787 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 909 transitions. Word has length 68 [2021-11-12 23:04:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:01,787 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 909 transitions. [2021-11-12 23:04:01,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:04:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 909 transitions. [2021-11-12 23:04:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:04:01,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:01,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:01,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:02,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:02,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -90463079, now seen corresponding path program 1 times [2021-11-12 23:04:02,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:02,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461377878] [2021-11-12 23:04:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:02,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:02,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:04:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:03,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:03,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461377878] [2021-11-12 23:04:03,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461377878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:03,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:03,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:04:03,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767153958] [2021-11-12 23:04:03,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:03,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:03,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:03,255 INFO L87 Difference]: Start difference. First operand 567 states and 909 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:04:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:03,431 INFO L93 Difference]: Finished difference Result 1082 states and 1762 transitions. [2021-11-12 23:04:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 23:04:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:03,439 INFO L225 Difference]: With dead ends: 1082 [2021-11-12 23:04:03,439 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:04:03,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:04:03,444 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 89 mSDsluCounter, 5281 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6178 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:03,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6178 Invalid, 60 Unknown, 0 Unchecked, 13.82ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 99.82ms Time] [2021-11-12 23:04:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:04:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:04:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 423 states have (on average 1.6382978723404256) internal successors, (693), 444 states have internal predecessors, (693), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:04:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 884 transitions. [2021-11-12 23:04:03,476 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 884 transitions. Word has length 70 [2021-11-12 23:04:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:03,476 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 884 transitions. [2021-11-12 23:04:03,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:04:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 884 transitions. [2021-11-12 23:04:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:04:03,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:03,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:03,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:03,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:03,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:03,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:03,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1141777357, now seen corresponding path program 1 times [2021-11-12 23:04:03,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:03,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827451800] [2021-11-12 23:04:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:03,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:03,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:03,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:04:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:04:04,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:04,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:05,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:05,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827451800] [2021-11-12 23:04:05,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827451800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:05,129 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:05,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:04:05,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627350934] [2021-11-12 23:04:05,129 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:05,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:04:05,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:04:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:04:05,132 INFO L87 Difference]: Start difference. First operand 546 states and 884 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:04:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:05,380 INFO L93 Difference]: Finished difference Result 1055 states and 1726 transitions. [2021-11-12 23:04:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:04:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 23:04:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:05,388 INFO L225 Difference]: With dead ends: 1055 [2021-11-12 23:04:05,388 INFO L226 Difference]: Without dead ends: 546 [2021-11-12 23:04:05,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:04:05,393 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 31 mSDsluCounter, 6058 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6927 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:05,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6927 Invalid, 91 Unknown, 0 Unchecked, 16.64ms Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 140.06ms Time] [2021-11-12 23:04:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-12 23:04:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2021-11-12 23:04:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 423 states have (on average 1.635933806146572) internal successors, (692), 444 states have internal predecessors, (692), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-12 23:04:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 883 transitions. [2021-11-12 23:04:05,422 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 883 transitions. Word has length 73 [2021-11-12 23:04:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:05,423 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 883 transitions. [2021-11-12 23:04:05,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:04:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 883 transitions. [2021-11-12 23:04:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:04:05,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:05,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:05,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:05,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:05,647 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1473566669, now seen corresponding path program 1 times [2021-11-12 23:04:05,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:05,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220509560] [2021-11-12 23:04:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:05,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:05,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:04:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:06,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:07,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:07,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220509560] [2021-11-12 23:04:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220509560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:07,353 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:07,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 23:04:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918948902] [2021-11-12 23:04:07,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:04:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:04:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:04:07,355 INFO L87 Difference]: Start difference. First operand 546 states and 883 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:04:09,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:11,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:13,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:24,234 INFO L93 Difference]: Finished difference Result 2750 states and 4582 transitions. [2021-11-12 23:04:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:04:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 74 [2021-11-12 23:04:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:24,262 INFO L225 Difference]: With dead ends: 2750 [2021-11-12 23:04:24,262 INFO L226 Difference]: Without dead ends: 2249 [2021-11-12 23:04:24,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:04:24,268 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 5125 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 5530 mSolverCounterSat, 1313 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14894.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5307 SdHoareTripleChecker+Valid, 3737 SdHoareTripleChecker+Invalid, 6846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 67.99ms SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 5530 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16370.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:24,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5307 Valid, 3737 Invalid, 6846 Unknown, 0 Unchecked, 67.99ms Time], IncrementalHoareTripleChecker [1313 Valid, 5530 Invalid, 3 Unknown, 0 Unchecked, 16370.53ms Time] [2021-11-12 23:04:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-11-12 23:04:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2061. [2021-11-12 23:04:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1588 states have (on average 1.6681360201511335) internal successors, (2649), 1653 states have internal predecessors, (2649), 391 states have call successors, (391), 78 states have call predecessors, (391), 81 states have return successors, (399), 356 states have call predecessors, (399), 386 states have call successors, (399) [2021-11-12 23:04:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3439 transitions. [2021-11-12 23:04:24,448 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3439 transitions. Word has length 74 [2021-11-12 23:04:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:24,449 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 3439 transitions. [2021-11-12 23:04:24,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-11-12 23:04:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3439 transitions. [2021-11-12 23:04:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:04:24,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:24,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:24,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:24,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:24,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash -106358317, now seen corresponding path program 1 times [2021-11-12 23:04:24,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:24,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725568528] [2021-11-12 23:04:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:24,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:24,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:24,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:04:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:04:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:25,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:27,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:27,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725568528] [2021-11-12 23:04:27,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725568528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:27,124 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:27,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:04:27,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825262542] [2021-11-12 23:04:27,124 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:27,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:04:27,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:27,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:04:27,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:04:27,126 INFO L87 Difference]: Start difference. First operand 2061 states and 3439 transitions. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (25), 5 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-12 23:04:29,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:31,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:33,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:35,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:40,635 INFO L93 Difference]: Finished difference Result 4614 states and 7830 transitions. [2021-11-12 23:04:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:04:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (25), 5 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) Word has length 113 [2021-11-12 23:04:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:40,663 INFO L225 Difference]: With dead ends: 4614 [2021-11-12 23:04:40,664 INFO L226 Difference]: Without dead ends: 2598 [2021-11-12 23:04:40,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:04:40,683 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 2178 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 807 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12501.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 4321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.15ms SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13141.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:40,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2178 Valid, 2767 Invalid, 4321 Unknown, 0 Unchecked, 36.15ms Time], IncrementalHoareTripleChecker [807 Valid, 3510 Invalid, 4 Unknown, 0 Unchecked, 13141.13ms Time] [2021-11-12 23:04:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-11-12 23:04:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2077. [2021-11-12 23:04:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 1600 states have (on average 1.663125) internal successors, (2661), 1665 states have internal predecessors, (2661), 391 states have call successors, (391), 78 states have call predecessors, (391), 85 states have return successors, (463), 360 states have call predecessors, (463), 386 states have call successors, (463) [2021-11-12 23:04:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3515 transitions. [2021-11-12 23:04:40,840 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3515 transitions. Word has length 113 [2021-11-12 23:04:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 3515 transitions. [2021-11-12 23:04:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (25), 5 states have call predecessors, (25), 8 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-12 23:04:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3515 transitions. [2021-11-12 23:04:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:04:40,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:40,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:40,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:41,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:41,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2000084104, now seen corresponding path program 1 times [2021-11-12 23:04:41,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:41,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081465416] [2021-11-12 23:04:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:41,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:41,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:41,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:04:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:04:41,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:42,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:42,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081465416] [2021-11-12 23:04:42,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081465416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:42,656 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:42,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:04:42,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646676872] [2021-11-12 23:04:42,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:42,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:04:42,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:04:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:04:42,658 INFO L87 Difference]: Start difference. First operand 2077 states and 3515 transitions. Second operand has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-12 23:04:44,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:46,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:55,638 INFO L93 Difference]: Finished difference Result 5505 states and 9378 transitions. [2021-11-12 23:04:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:04:55,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 113 [2021-11-12 23:04:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:55,670 INFO L225 Difference]: With dead ends: 5505 [2021-11-12 23:04:55,670 INFO L226 Difference]: Without dead ends: 3473 [2021-11-12 23:04:55,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:04:55,687 INFO L933 BasicCegarLoop]: 1819 mSDtfsCounter, 4159 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 5671 mSolverCounterSat, 1561 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11143.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4249 SdHoareTripleChecker+Valid, 4488 SdHoareTripleChecker+Invalid, 7234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.74ms SdHoareTripleChecker+Time, 1561 IncrementalHoareTripleChecker+Valid, 5671 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12276.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:55,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4249 Valid, 4488 Invalid, 7234 Unknown, 0 Unchecked, 56.74ms Time], IncrementalHoareTripleChecker [1561 Valid, 5671 Invalid, 2 Unknown, 0 Unchecked, 12276.15ms Time] [2021-11-12 23:04:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3473 states. [2021-11-12 23:04:55,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3473 to 2993. [2021-11-12 23:04:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2248 states have (on average 1.6236654804270463) internal successors, (3650), 2339 states have internal predecessors, (3650), 613 states have call successors, (613), 109 states have call predecessors, (613), 131 states have return successors, (715), 577 states have call predecessors, (715), 608 states have call successors, (715) [2021-11-12 23:04:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4978 transitions. [2021-11-12 23:04:55,941 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4978 transitions. Word has length 113 [2021-11-12 23:04:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:55,942 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 4978 transitions. [2021-11-12 23:04:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 11 states have internal predecessors, (127), 7 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-12 23:04:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4978 transitions. [2021-11-12 23:04:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:04:55,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:55,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:55,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:56,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:56,171 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1355446495, now seen corresponding path program 1 times [2021-11-12 23:04:56,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:56,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393272465] [2021-11-12 23:04:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:56,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:56,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:56,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:04:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:04:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:57,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:57,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393272465] [2021-11-12 23:04:57,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393272465] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:57,784 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:57,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 23:04:57,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677703584] [2021-11-12 23:04:57,785 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:57,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:04:57,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:04:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:04:57,786 INFO L87 Difference]: Start difference. First operand 2993 states and 4978 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:04:59,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:01,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:08,034 INFO L93 Difference]: Finished difference Result 9863 states and 16862 transitions. [2021-11-12 23:05:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:05:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 114 [2021-11-12 23:05:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:08,096 INFO L225 Difference]: With dead ends: 9863 [2021-11-12 23:05:08,096 INFO L226 Difference]: Without dead ends: 6915 [2021-11-12 23:05:08,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:05:08,128 INFO L933 BasicCegarLoop]: 1476 mSDtfsCounter, 5180 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 1452 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8865.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5266 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 5167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.02ms SdHoareTripleChecker+Time, 1452 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9639.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:08,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5266 Valid, 2991 Invalid, 5167 Unknown, 0 Unchecked, 52.02ms Time], IncrementalHoareTripleChecker [1452 Valid, 3713 Invalid, 2 Unknown, 0 Unchecked, 9639.35ms Time] [2021-11-12 23:05:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2021-11-12 23:05:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6573. [2021-11-12 23:05:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6573 states, 4950 states have (on average 1.6183838383838385) internal successors, (8011), 5168 states have internal predecessors, (8011), 1317 states have call successors, (1317), 269 states have call predecessors, (1317), 305 states have return successors, (1527), 1212 states have call predecessors, (1527), 1312 states have call successors, (1527) [2021-11-12 23:05:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6573 states to 6573 states and 10855 transitions. [2021-11-12 23:05:08,734 INFO L78 Accepts]: Start accepts. Automaton has 6573 states and 10855 transitions. Word has length 114 [2021-11-12 23:05:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:08,734 INFO L470 AbstractCegarLoop]: Abstraction has 6573 states and 10855 transitions. [2021-11-12 23:05:08,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-12 23:05:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6573 states and 10855 transitions. [2021-11-12 23:05:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:05:08,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:08,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:05:08,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:08,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:08,960 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1245771409, now seen corresponding path program 1 times [2021-11-12 23:05:08,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:08,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661202214] [2021-11-12 23:05:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:08,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:08,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:08,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:05:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:09,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:05:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:05:11,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:05:17,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:17,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661202214] [2021-11-12 23:05:17,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661202214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:17,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:17,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-12 23:05:17,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996654523] [2021-11-12 23:05:17,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:05:17,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:05:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:05:17,376 INFO L87 Difference]: Start difference. First operand 6573 states and 10855 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-12 23:05:19,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:21,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:23,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:32,429 INFO L93 Difference]: Finished difference Result 16389 states and 27241 transitions. [2021-11-12 23:05:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:05:32,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2021-11-12 23:05:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:32,544 INFO L225 Difference]: With dead ends: 16389 [2021-11-12 23:05:32,545 INFO L226 Difference]: Without dead ends: 9861 [2021-11-12 23:05:32,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:05:32,584 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 6650 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 4529 mSolverCounterSat, 1881 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12722.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6728 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 6413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.36ms SdHoareTripleChecker+Time, 1881 IncrementalHoareTripleChecker+Valid, 4529 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13884.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:32,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6728 Valid, 3593 Invalid, 6413 Unknown, 0 Unchecked, 41.36ms Time], IncrementalHoareTripleChecker [1881 Valid, 4529 Invalid, 3 Unknown, 0 Unchecked, 13884.03ms Time] [2021-11-12 23:05:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9861 states. [2021-11-12 23:05:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9861 to 9299. [2021-11-12 23:05:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9299 states, 6928 states have (on average 1.611864896073903) internal successors, (11167), 7260 states have internal predecessors, (11167), 1942 states have call successors, (1942), 378 states have call predecessors, (1942), 428 states have return successors, (2248), 1781 states have call predecessors, (2248), 1937 states have call successors, (2248) [2021-11-12 23:05:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9299 states to 9299 states and 15357 transitions. [2021-11-12 23:05:33,408 INFO L78 Accepts]: Start accepts. Automaton has 9299 states and 15357 transitions. Word has length 116 [2021-11-12 23:05:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:33,409 INFO L470 AbstractCegarLoop]: Abstraction has 9299 states and 15357 transitions. [2021-11-12 23:05:33,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-12 23:05:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9299 states and 15357 transitions. [2021-11-12 23:05:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:05:33,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:33,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:05:33,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:33,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:33,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash -919238983, now seen corresponding path program 1 times [2021-11-12 23:05:33,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:33,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328251722] [2021-11-12 23:05:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:33,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:33,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:33,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:05:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:05:34,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:34,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:35,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:35,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328251722] [2021-11-12 23:05:35,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328251722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:35,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:35,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 23:05:35,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015917957] [2021-11-12 23:05:35,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:35,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:05:35,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:05:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:05:35,521 INFO L87 Difference]: Start difference. First operand 9299 states and 15357 transitions. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:05:37,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:39,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:41,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:43,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:05:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:05:55,011 INFO L93 Difference]: Finished difference Result 32531 states and 55553 transitions. [2021-11-12 23:05:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:05:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 120 [2021-11-12 23:05:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:05:55,269 INFO L225 Difference]: With dead ends: 32531 [2021-11-12 23:05:55,269 INFO L226 Difference]: Without dead ends: 23235 [2021-11-12 23:05:55,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:05:55,353 INFO L933 BasicCegarLoop]: 1835 mSDtfsCounter, 6760 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 7861 mSolverCounterSat, 2932 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16612.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6862 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 10797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.69ms SdHoareTripleChecker+Time, 2932 IncrementalHoareTripleChecker+Valid, 7861 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17931.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:05:55,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6862 Valid, 5137 Invalid, 10797 Unknown, 0 Unchecked, 51.69ms Time], IncrementalHoareTripleChecker [2932 Valid, 7861 Invalid, 4 Unknown, 0 Unchecked, 17931.65ms Time] [2021-11-12 23:05:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23235 states. [2021-11-12 23:05:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23235 to 18378. [2021-11-12 23:05:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18378 states, 13218 states have (on average 1.5915418368890906) internal successors, (21037), 14012 states have internal predecessors, (21037), 4345 states have call successors, (4345), 636 states have call predecessors, (4345), 814 states have return successors, (5239), 4147 states have call predecessors, (5239), 4340 states have call successors, (5239) [2021-11-12 23:05:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18378 states to 18378 states and 30621 transitions. [2021-11-12 23:05:57,181 INFO L78 Accepts]: Start accepts. Automaton has 18378 states and 30621 transitions. Word has length 120 [2021-11-12 23:05:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:05:57,182 INFO L470 AbstractCegarLoop]: Abstraction has 18378 states and 30621 transitions. [2021-11-12 23:05:57,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (27), 6 states have call predecessors, (27), 7 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:05:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18378 states and 30621 transitions. [2021-11-12 23:05:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:05:57,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:05:57,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:05:57,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:05:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:05:57,402 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:05:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:05:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash -767687049, now seen corresponding path program 1 times [2021-11-12 23:05:57,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:05:57,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956550423] [2021-11-12 23:05:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:05:57,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:05:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:05:57,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:05:57,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:05:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:05:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:05:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:58,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:05:59,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:59,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956550423] [2021-11-12 23:05:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956550423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:05:59,165 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:05:59,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:05:59,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833060529] [2021-11-12 23:05:59,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:05:59,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:05:59,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:05:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:05:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:05:59,168 INFO L87 Difference]: Start difference. First operand 18378 states and 30621 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:06:01,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:03,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:10,489 INFO L93 Difference]: Finished difference Result 64242 states and 110246 transitions. [2021-11-12 23:06:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 121 [2021-11-12 23:06:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:10,812 INFO L225 Difference]: With dead ends: 64242 [2021-11-12 23:06:10,812 INFO L226 Difference]: Without dead ends: 45912 [2021-11-12 23:06:10,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:10,923 INFO L933 BasicCegarLoop]: 1767 mSDtfsCounter, 4190 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 1363 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7568.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4291 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.66ms SdHoareTripleChecker+Time, 1363 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8169.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:10,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4291 Valid, 3072 Invalid, 4019 Unknown, 0 Unchecked, 23.66ms Time], IncrementalHoareTripleChecker [1363 Valid, 2654 Invalid, 2 Unknown, 0 Unchecked, 8169.42ms Time] [2021-11-12 23:06:10,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45912 states. [2021-11-12 23:06:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45912 to 42179. [2021-11-12 23:06:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42179 states, 29097 states have (on average 1.5766917551637627) internal successors, (45877), 31151 states have internal predecessors, (45877), 11376 states have call successors, (11376), 1160 states have call predecessors, (11376), 1705 states have return successors, (14272), 11198 states have call predecessors, (14272), 11371 states have call successors, (14272) [2021-11-12 23:06:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42179 states to 42179 states and 71525 transitions. [2021-11-12 23:06:15,182 INFO L78 Accepts]: Start accepts. Automaton has 42179 states and 71525 transitions. Word has length 121 [2021-11-12 23:06:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:15,183 INFO L470 AbstractCegarLoop]: Abstraction has 42179 states and 71525 transitions. [2021-11-12 23:06:15,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:06:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42179 states and 71525 transitions. [2021-11-12 23:06:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:06:15,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:15,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:15,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:15,406 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -486567108, now seen corresponding path program 1 times [2021-11-12 23:06:15,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:15,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372136831] [2021-11-12 23:06:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:15,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:15,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:15,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:06:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:16,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:06:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:16,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:17,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:17,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372136831] [2021-11-12 23:06:17,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372136831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:17,322 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:17,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:06:17,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56891943] [2021-11-12 23:06:17,323 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:17,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:17,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:06:17,324 INFO L87 Difference]: Start difference. First operand 42179 states and 71525 transitions. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:06:19,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:21,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:06:35,324 INFO L93 Difference]: Finished difference Result 163876 states and 287003 transitions. [2021-11-12 23:06:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:06:35,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 122 [2021-11-12 23:06:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:06:36,430 INFO L225 Difference]: With dead ends: 163876 [2021-11-12 23:06:36,430 INFO L226 Difference]: Without dead ends: 121747 [2021-11-12 23:06:36,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:06:36,656 INFO L933 BasicCegarLoop]: 1775 mSDtfsCounter, 3560 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 1162 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7674.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3662 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 3828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.21ms SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8254.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:06:36,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3662 Valid, 3128 Invalid, 3828 Unknown, 0 Unchecked, 23.21ms Time], IncrementalHoareTripleChecker [1162 Valid, 2664 Invalid, 2 Unknown, 0 Unchecked, 8254.61ms Time] [2021-11-12 23:06:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121747 states. [2021-11-12 23:06:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121747 to 110433. [2021-11-12 23:06:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110433 states, 73030 states have (on average 1.566041352868684) internal successors, (114368), 78773 states have internal predecessors, (114368), 33407 states have call successors, (33407), 2208 states have call predecessors, (33407), 3995 states have return successors, (43957), 33741 states have call predecessors, (43957), 33402 states have call successors, (43957) [2021-11-12 23:06:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110433 states to 110433 states and 191732 transitions. [2021-11-12 23:06:48,198 INFO L78 Accepts]: Start accepts. Automaton has 110433 states and 191732 transitions. Word has length 122 [2021-11-12 23:06:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:06:48,199 INFO L470 AbstractCegarLoop]: Abstraction has 110433 states and 191732 transitions. [2021-11-12 23:06:48,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:06:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 110433 states and 191732 transitions. [2021-11-12 23:06:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:06:48,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:06:48,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:06:48,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:06:48,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:06:48,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:06:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:06:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash 902979164, now seen corresponding path program 1 times [2021-11-12 23:06:48,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:06:48,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804593979] [2021-11-12 23:06:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:06:48,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:06:48,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:06:48,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:06:48,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09ef3da1-f9cc-4831-a288-67d2ddaab595/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:06:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:06:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:06:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:06:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:06:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:06:50,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:06:50,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804593979] [2021-11-12 23:06:50,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804593979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:06:50,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:06:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:06:50,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140563284] [2021-11-12 23:06:50,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:06:50,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:06:50,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:06:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:06:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:06:50,072 INFO L87 Difference]: Start difference. First operand 110433 states and 191732 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 8 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 23:06:52,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:06:54,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []