./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i --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_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/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_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/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_5a9982ef-b41b-4141-a921-1147feb881b7/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 a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:38:49,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:38:49,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:38:49,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:38:49,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:38:49,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:38:49,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:38:49,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:38:49,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:38:49,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:38:49,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:38:49,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:38:49,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:38:49,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:38:49,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:38:49,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:38:49,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:38:49,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:38:49,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:38:49,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:38:49,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:38:49,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:38:49,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:38:49,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:38:49,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:38:49,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:38:49,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:38:49,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:38:49,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:38:49,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:38:49,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:38:49,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:38:49,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:38:49,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:38:49,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:38:49,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:38:49,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:38:49,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:38:49,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:38:49,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:38:49,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:38:49,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:38:49,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:38:49,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:38:49,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:38:49,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:38:49,588 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:38:49,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:38:49,588 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:38:49,588 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:38:49,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:38:49,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:38:49,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:38:49,589 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:38:49,589 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:38:49,589 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:38:49,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:38:49,590 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:38:49,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:38:49,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:38:49,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:38:49,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:38:49,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:38:49,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:38:49,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:38:49,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:38:49,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:38:49,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:38:49,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:38:49,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:38:49,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:38:49,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:38:49,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:38:49,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:38:49,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:38:49,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:38:49,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:38:49,596 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:38:49,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:38:49,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:38:49,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:38:49,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:38:49,598 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_5a9982ef-b41b-4141-a921-1147feb881b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 [2021-11-13 01:38:49,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:38:49,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:38:49,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:38:49,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:38:49,896 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:38:49,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-13 01:38:49,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9b1d742a8/4b0a9729e2f84e4884ea6cfaf94243c8/FLAG0d0a1d228 [2021-11-13 01:38:50,585 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:38:50,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-13 01:38:50,604 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9b1d742a8/4b0a9729e2f84e4884ea6cfaf94243c8/FLAG0d0a1d228 [2021-11-13 01:38:50,823 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9b1d742a8/4b0a9729e2f84e4884ea6cfaf94243c8 [2021-11-13 01:38:50,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:38:50,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:38:50,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:38:50,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:38:50,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:38:50,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:38:50" (1/1) ... [2021-11-13 01:38:50,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36da66e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:50, skipping insertion in model container [2021-11-13 01:38:50,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:38:50" (1/1) ... [2021-11-13 01:38:50,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:38:50,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:38:51,329 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-13 01:38:51,472 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-13 01:38:51,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:38:51,537 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) [2021-11-13 01:38:51,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@701e78d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:51, skipping insertion in model container [2021-11-13 01:38:51,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:38:51,538 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:38:51,540 INFO L158 Benchmark]: Toolchain (without parser) took 712.84ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 71.5MB in the end (delta: 8.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:38:51,542 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:38:51,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 710.28ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 71.5MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 01:38:51,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory is still 67.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 710.28ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 71.5MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 737]: 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_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/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_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/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_5a9982ef-b41b-4141-a921-1147feb881b7/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 a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:38:53,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:38:53,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:38:53,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:38:53,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:38:53,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:38:53,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:38:53,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:38:53,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:38:53,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:38:53,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:38:53,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:38:53,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:38:53,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:38:53,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:38:53,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:38:53,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:38:53,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:38:53,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:38:53,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:38:53,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:38:53,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:38:53,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:38:53,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:38:53,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:38:53,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:38:53,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:38:53,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:38:53,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:38:53,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:38:53,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:38:53,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:38:53,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:38:53,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:38:53,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:38:53,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:38:53,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:38:53,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:38:53,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:38:53,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:38:53,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:38:53,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:38:53,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:38:53,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:38:53,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:38:53,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:38:53,726 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:38:53,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:38:53,727 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:38:53,727 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:38:53,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:38:53,728 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:38:53,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:38:53,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:38:53,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:38:53,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:38:53,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:38:53,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:38:53,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:38:53,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:38:53,730 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:38:53,731 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:38:53,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:38:53,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:38:53,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:38:53,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:38:53,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:38:53,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:38:53,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:38:53,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:38:53,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:38:53,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:38:53,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:38:53,734 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:38:53,734 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:53,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:38:53,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:38:53,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:38:53,735 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_5a9982ef-b41b-4141-a921-1147feb881b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a37ff9cc75e7eb9f5325f8fa274b6f05ade1742d661d8f4c826631afb9b4bde2 [2021-11-13 01:38:54,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:38:54,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:38:54,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:38:54,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:38:54,134 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:38:54,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-13 01:38:54,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9cf8b1e96/3176a420d3cf42d8982326455069bb3f/FLAGe2b42fe3a [2021-11-13 01:38:54,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:38:54,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i [2021-11-13 01:38:54,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9cf8b1e96/3176a420d3cf42d8982326455069bb3f/FLAGe2b42fe3a [2021-11-13 01:38:55,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/data/9cf8b1e96/3176a420d3cf42d8982326455069bb3f [2021-11-13 01:38:55,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:38:55,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:38:55,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:38:55,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:38:55,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:38:55,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:38:55" (1/1) ... [2021-11-13 01:38:55,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608d1f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:55, skipping insertion in model container [2021-11-13 01:38:55,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:38:55" (1/1) ... [2021-11-13 01:38:55,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:38:55,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:38:55,541 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-13 01:38:55,738 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-13 01:38:55,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:38:55,805 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:38:55,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:38:55,843 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-13 01:38:55,940 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-13 01:38:55,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:38:55,980 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:38:56,022 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[33021,33034] [2021-11-13 01:38:56,159 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_5a9982ef-b41b-4141-a921-1147feb881b7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test5-3.i[49681,49694] [2021-11-13 01:38:56,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:38:56,222 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:38:56,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56 WrapperNode [2021-11-13 01:38:56,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:38:56,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:38:56,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:38:56,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:38:56,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:38:56,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:38:56,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:38:56,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:38:56,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:38:56,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:38:56,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:38:56,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:38:56,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (1/1) ... [2021-11-13 01:38:56,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:38:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:38:56,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:38:56,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:38:56,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:38:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:38:56,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:38:56,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:38:56,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 01:38:56,632 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 01:38:56,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:38:56,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:38:56,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:38:56,633 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 01:38:56,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:38:56,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:38:56,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:38:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:38:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:38:56,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:39:08,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:39:08,117 INFO L299 CfgBuilder]: Removed 100 assume(true) statements. [2021-11-13 01:39:08,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:08 BoogieIcfgContainer [2021-11-13 01:39:08,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:39:08,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:39:08,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:39:08,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:39:08,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:38:55" (1/3) ... [2021-11-13 01:39:08,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:08, skipping insertion in model container [2021-11-13 01:39:08,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:38:56" (2/3) ... [2021-11-13 01:39:08,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:39:08, skipping insertion in model container [2021-11-13 01:39:08,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:39:08" (3/3) ... [2021-11-13 01:39:08,130 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test5-3.i [2021-11-13 01:39:08,136 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:39:08,136 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:39:08,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:39:08,195 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 [2021-11-13 01:39:08,195 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:39:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 01:39:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 01:39:08,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:08,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:08,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-13 01:39:08,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:08,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718112617] [2021-11-13 01:39:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:08,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:08,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:08,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:08,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:39:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:39:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:08,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:08,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718112617] [2021-11-13 01:39:08,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718112617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:08,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:08,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:39:08,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534639134] [2021-11-13 01:39:08,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:08,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:39:08,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:39:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:39:08,663 INFO L87 Difference]: Start difference. First operand has 308 states, 292 states have (on average 1.702054794520548) internal successors, (497), 299 states have internal predecessors, (497), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:08,735 INFO L93 Difference]: Finished difference Result 614 states and 1041 transitions. [2021-11-13 01:39:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:39:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 01:39:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:08,754 INFO L225 Difference]: With dead ends: 614 [2021-11-13 01:39:08,755 INFO L226 Difference]: Without dead ends: 254 [2021-11-13 01:39:08,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:39:08,774 INFO L933 BasicCegarLoop]: 410 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, 410 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:08,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:39:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-13 01:39:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-13 01:39:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 01:39:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-13 01:39:08,848 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-13 01:39:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:08,849 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-13 01:39:08,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-13 01:39:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:39:08,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:08,853 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] [2021-11-13 01:39:08,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:09,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:09,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-13 01:39:09,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:09,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448159348] [2021-11-13 01:39:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:09,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:09,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:09,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:39:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:39:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:09,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:09,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:09,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448159348] [2021-11-13 01:39:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448159348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:09,652 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:09,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:39:09,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928639492] [2021-11-13 01:39:09,652 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:09,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:39:09,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:39:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:39:09,655 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:10,019 INFO L93 Difference]: Finished difference Result 575 states and 771 transitions. [2021-11-13 01:39:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-13 01:39:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:10,024 INFO L225 Difference]: With dead ends: 575 [2021-11-13 01:39:10,025 INFO L226 Difference]: Without dead ends: 497 [2021-11-13 01:39:10,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:39:10,028 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 871 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.94ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 305.61ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:10,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 690 Invalid, 41 Unknown, 0 Unchecked, 11.94ms Time], IncrementalHoareTripleChecker [17 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 305.61ms Time] [2021-11-13 01:39:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-13 01:39:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 425. [2021-11-13 01:39:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 404 states have (on average 1.306930693069307) internal successors, (528), 410 states have internal predecessors, (528), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:39:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 562 transitions. [2021-11-13 01:39:10,073 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 562 transitions. Word has length 42 [2021-11-13 01:39:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 562 transitions. [2021-11-13 01:39:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 562 transitions. [2021-11-13 01:39:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 01:39:10,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:10,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:10,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:10,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:10,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash 627365017, now seen corresponding path program 1 times [2021-11-13 01:39:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:10,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569254709] [2021-11-13 01:39:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:10,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:10,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:10,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:39:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:39:11,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:39:12,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:12,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569254709] [2021-11-13 01:39:12,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569254709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:12,236 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:12,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:39:12,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268880649] [2021-11-13 01:39:12,237 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:12,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:12,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:39:12,239 INFO L87 Difference]: Start difference. First operand 425 states and 562 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:12,365 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2021-11-13 01:39:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-13 01:39:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:12,370 INFO L225 Difference]: With dead ends: 850 [2021-11-13 01:39:12,370 INFO L226 Difference]: Without dead ends: 433 [2021-11-13 01:39:12,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:12,373 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.51ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.50ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:12,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 669 Invalid, 69 Unknown, 0 Unchecked, 3.51ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 90.50ms Time] [2021-11-13 01:39:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-11-13 01:39:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2021-11-13 01:39:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 416 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:39:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 552 transitions. [2021-11-13 01:39:12,400 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 552 transitions. Word has length 238 [2021-11-13 01:39:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:12,400 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 552 transitions. [2021-11-13 01:39:12,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 552 transitions. [2021-11-13 01:39:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 01:39:12,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:12,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:12,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:12,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:12,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1137440641, now seen corresponding path program 1 times [2021-11-13 01:39:12,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:12,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957152583] [2021-11-13 01:39:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:12,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:12,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:12,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:39:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:39:14,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:39:14,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:14,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957152583] [2021-11-13 01:39:14,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957152583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:14,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:39:14,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:39:14,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344901601] [2021-11-13 01:39:14,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:14,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:39:14,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:39:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:39:14,829 INFO L87 Difference]: Start difference. First operand 431 states and 552 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:15,235 INFO L93 Difference]: Finished difference Result 807 states and 1042 transitions. [2021-11-13 01:39:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:39:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-13 01:39:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:15,246 INFO L225 Difference]: With dead ends: 807 [2021-11-13 01:39:15,246 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 01:39:15,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:39:15,248 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 11 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 375.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 386.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:15,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 635 Invalid, 8 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 386.66ms Time] [2021-11-13 01:39:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 01:39:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-11-13 01:39:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 408 states have (on average 1.2622549019607843) internal successors, (515), 414 states have internal predecessors, (515), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:39:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 549 transitions. [2021-11-13 01:39:15,271 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 549 transitions. Word has length 238 [2021-11-13 01:39:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:15,271 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 549 transitions. [2021-11-13 01:39:15,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:39:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 549 transitions. [2021-11-13 01:39:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 01:39:15,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:15,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:15,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:15,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:15,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:15,498 INFO L85 PathProgramCache]: Analyzing trace with hash 733455842, now seen corresponding path program 1 times [2021-11-13 01:39:15,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:15,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934501554] [2021-11-13 01:39:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:15,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:15,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:15,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:39:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 01:39:16,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:39:17,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:17,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934501554] [2021-11-13 01:39:17,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934501554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:39:17,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:39:17,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-13 01:39:17,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905577802] [2021-11-13 01:39:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:39:17,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:39:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:39:17,329 INFO L87 Difference]: Start difference. First operand 429 states and 549 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:39:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:17,410 INFO L93 Difference]: Finished difference Result 814 states and 1061 transitions. [2021-11-13 01:39:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 253 [2021-11-13 01:39:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:17,414 INFO L225 Difference]: With dead ends: 814 [2021-11-13 01:39:17,415 INFO L226 Difference]: Without dead ends: 432 [2021-11-13 01:39:17,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:39:17,416 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 2 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.50ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:17,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 959 Invalid, 21 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 55.50ms Time] [2021-11-13 01:39:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-13 01:39:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-13 01:39:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 417 states have internal predecessors, (518), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 01:39:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 556 transitions. [2021-11-13 01:39:17,446 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 556 transitions. Word has length 253 [2021-11-13 01:39:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:17,447 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 556 transitions. [2021-11-13 01:39:17,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:39:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 556 transitions. [2021-11-13 01:39:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 01:39:17,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:17,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:17,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:17,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:17,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1488672828, now seen corresponding path program 1 times [2021-11-13 01:39:17,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:17,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432370462] [2021-11-13 01:39:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:17,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:17,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:17,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:17,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:39:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:39:18,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:39:19,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:19,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432370462] [2021-11-13 01:39:19,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432370462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:19,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437469085] [2021-11-13 01:39:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:19,433 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:19,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:19,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:19,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 01:39:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 01:39:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:39:20,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:39:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437469085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:21,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:21,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 10] imperfect sequences [5, 5] total 16 [2021-11-13 01:39:21,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121624570] [2021-11-13 01:39:21,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:21,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 01:39:21,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 01:39:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:39:21,614 INFO L87 Difference]: Start difference. First operand 432 states and 556 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:21,843 INFO L93 Difference]: Finished difference Result 810 states and 1058 transitions. [2021-11-13 01:39:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:21,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 01:39:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:21,847 INFO L225 Difference]: With dead ends: 810 [2021-11-13 01:39:21,848 INFO L226 Difference]: Without dead ends: 478 [2021-11-13 01:39:21,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1002 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:39:21,850 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 22 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.07ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.13ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:21,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1448 Invalid, 174 Unknown, 0 Unchecked, 5.07ms Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 199.13ms Time] [2021-11-13 01:39:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-13 01:39:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 472. [2021-11-13 01:39:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 450 states have (on average 1.24) internal successors, (558), 457 states have internal predecessors, (558), 17 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-11-13 01:39:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 596 transitions. [2021-11-13 01:39:21,873 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 596 transitions. Word has length 255 [2021-11-13 01:39:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:21,874 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 596 transitions. [2021-11-13 01:39:21,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 596 transitions. [2021-11-13 01:39:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 01:39:21,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:21,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:21,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:22,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:22,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:22,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -301049792, now seen corresponding path program 1 times [2021-11-13 01:39:22,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:22,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774360994] [2021-11-13 01:39:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:22,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:22,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:22,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:22,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:39:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:39:23,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:39:23,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:23,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774360994] [2021-11-13 01:39:23,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774360994] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:23,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286452293] [2021-11-13 01:39:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:23,921 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:23,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:23,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 01:39:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:24,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:39:25,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-13 01:39:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286452293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:25,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:25,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:39:25,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036676427] [2021-11-13 01:39:25,816 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:25,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:39:25,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:39:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:39:25,817 INFO L87 Difference]: Start difference. First operand 472 states and 596 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:26,935 INFO L93 Difference]: Finished difference Result 1026 states and 1310 transitions. [2021-11-13 01:39:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:39:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 255 [2021-11-13 01:39:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:26,942 INFO L225 Difference]: With dead ends: 1026 [2021-11-13 01:39:26,942 INFO L226 Difference]: Without dead ends: 748 [2021-11-13 01:39:26,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:39:26,944 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 233 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1055.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1088.98ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:26,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 765 Invalid, 19 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1088.98ms Time] [2021-11-13 01:39:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-13 01:39:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2021-11-13 01:39:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 714 states have (on average 1.2478991596638656) internal successors, (891), 726 states have internal predecessors, (891), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (34), 19 states have call predecessors, (34), 27 states have call successors, (34) [2021-11-13 01:39:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 952 transitions. [2021-11-13 01:39:26,980 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 952 transitions. Word has length 255 [2021-11-13 01:39:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:26,981 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 952 transitions. [2021-11-13 01:39:26,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 952 transitions. [2021-11-13 01:39:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 01:39:26,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:26,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:27,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:27,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:27,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:27,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -627607892, now seen corresponding path program 1 times [2021-11-13 01:39:27,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:27,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707140870] [2021-11-13 01:39:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:27,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:27,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:27,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:39:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:39:28,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:39:29,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:29,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707140870] [2021-11-13 01:39:29,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707140870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:29,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1352346268] [2021-11-13 01:39:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:29,126 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:29,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:29,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:29,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:39:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:39:29,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 01:39:31,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-13 01:39:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1352346268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:33,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:33,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 01:39:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638190563] [2021-11-13 01:39:33,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:33,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:39:33,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:39:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:39:33,060 INFO L87 Difference]: Start difference. First operand 746 states and 952 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:33,643 INFO L93 Difference]: Finished difference Result 1054 states and 1345 transitions. [2021-11-13 01:39:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:39:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2021-11-13 01:39:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:33,649 INFO L225 Difference]: With dead ends: 1054 [2021-11-13 01:39:33,649 INFO L226 Difference]: Without dead ends: 745 [2021-11-13 01:39:33,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:39:33,651 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 93 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 533.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 562.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:33,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 713 Invalid, 16 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 562.41ms Time] [2021-11-13 01:39:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-13 01:39:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2021-11-13 01:39:33,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 712 states have (on average 1.2485955056179776) internal successors, (889), 724 states have internal predecessors, (889), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:39:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 947 transitions. [2021-11-13 01:39:33,682 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 947 transitions. Word has length 262 [2021-11-13 01:39:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:33,683 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 947 transitions. [2021-11-13 01:39:33,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 01:39:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 947 transitions. [2021-11-13 01:39:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:39:33,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:33,689 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:33,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:33,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-13 01:39:34,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:34,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1990050795, now seen corresponding path program 1 times [2021-11-13 01:39:34,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:34,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878040231] [2021-11-13 01:39:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:34,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:34,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:34,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:39:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:39:35,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:39:35,915 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:35,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878040231] [2021-11-13 01:39:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878040231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:35,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882727301] [2021-11-13 01:39:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:35,916 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:35,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:35,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 01:39:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:39:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:39:36,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:39:37,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882727301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:37,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:37,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 7] imperfect sequences [5, 5] total 13 [2021-11-13 01:39:37,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751016970] [2021-11-13 01:39:37,501 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:37,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:39:37,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:39:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:39:37,503 INFO L87 Difference]: Start difference. First operand 743 states and 947 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:39:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:37,660 INFO L93 Difference]: Finished difference Result 961 states and 1255 transitions. [2021-11-13 01:39:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:39:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 01:39:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:37,666 INFO L225 Difference]: With dead ends: 961 [2021-11-13 01:39:37,666 INFO L226 Difference]: Without dead ends: 806 [2021-11-13 01:39:37,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:39:37,668 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 34 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.62ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:37,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 593 Invalid, 133 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [85 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 131.62ms Time] [2021-11-13 01:39:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-11-13 01:39:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 803. [2021-11-13 01:39:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 772 states have (on average 1.2292746113989637) internal successors, (949), 784 states have internal predecessors, (949), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:39:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1007 transitions. [2021-11-13 01:39:37,700 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1007 transitions. Word has length 279 [2021-11-13 01:39:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:37,701 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1007 transitions. [2021-11-13 01:39:37,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:39:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1007 transitions. [2021-11-13 01:39:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:39:37,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:37,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:37,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:37,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:38,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:38,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash 603847401, now seen corresponding path program 1 times [2021-11-13 01:39:38,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:38,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171866425] [2021-11-13 01:39:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:38,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:38,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:38,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:39:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:39:39,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:39:39,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:39,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171866425] [2021-11-13 01:39:39,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171866425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:39,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1206816746] [2021-11-13 01:39:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:39,797 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:39,797 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:39:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:39:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-13 01:39:40,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 01:39:41,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1206816746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:41,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-13 01:39:41,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269940199] [2021-11-13 01:39:41,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:39:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:39:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:39:41,424 INFO L87 Difference]: Start difference. First operand 803 states and 1007 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:39:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:41,609 INFO L93 Difference]: Finished difference Result 1466 states and 1855 transitions. [2021-11-13 01:39:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 279 [2021-11-13 01:39:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:41,615 INFO L225 Difference]: With dead ends: 1466 [2021-11-13 01:39:41,615 INFO L226 Difference]: Without dead ends: 755 [2021-11-13 01:39:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 01:39:41,618 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 291 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.66ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.90ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:41,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1403 Invalid, 103 Unknown, 0 Unchecked, 4.66ms Time], IncrementalHoareTripleChecker [39 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 151.90ms Time] [2021-11-13 01:39:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-13 01:39:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 752. [2021-11-13 01:39:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.1997226074895977) internal successors, (865), 733 states have internal predecessors, (865), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:39:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 923 transitions. [2021-11-13 01:39:41,650 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 923 transitions. Word has length 279 [2021-11-13 01:39:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:41,651 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 923 transitions. [2021-11-13 01:39:41,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:39:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 923 transitions. [2021-11-13 01:39:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:39:41,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:41,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:41,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:41,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:42,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:39:42,061 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash 874348137, now seen corresponding path program 1 times [2021-11-13 01:39:42,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:42,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365127756] [2021-11-13 01:39:42,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:42,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:42,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:42,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:39:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:42,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:39:43,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:39:43,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:43,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365127756] [2021-11-13 01:39:43,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365127756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:43,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [317685262] [2021-11-13 01:39:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:43,728 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:43,729 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 01:39:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:44,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:44,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:39:44,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-13 01:39:44,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [317685262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:39:44,961 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:39:44,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-13 01:39:44,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039340090] [2021-11-13 01:39:44,961 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:39:44,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:39:44,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:44,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:39:44,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:39:44,963 INFO L87 Difference]: Start difference. First operand 752 states and 923 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:39:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:45,088 INFO L93 Difference]: Finished difference Result 931 states and 1165 transitions. [2021-11-13 01:39:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:39:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 279 [2021-11-13 01:39:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:45,095 INFO L225 Difference]: With dead ends: 931 [2021-11-13 01:39:45,095 INFO L226 Difference]: Without dead ends: 708 [2021-11-13 01:39:45,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:39:45,097 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 80 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:45,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1010 Invalid, 66 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [27 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 87.32ms Time] [2021-11-13 01:39:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-13 01:39:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2021-11-13 01:39:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 670 states have (on average 1.1656716417910449) internal successors, (781), 682 states have internal predecessors, (781), 26 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (32), 18 states have call predecessors, (32), 26 states have call successors, (32) [2021-11-13 01:39:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 839 transitions. [2021-11-13 01:39:45,140 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 839 transitions. Word has length 279 [2021-11-13 01:39:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:45,141 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 839 transitions. [2021-11-13 01:39:45,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 01:39:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 839 transitions. [2021-11-13 01:39:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 01:39:45,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:45,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:45,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:45,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-13 01:39:45,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:45,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1511815561, now seen corresponding path program 1 times [2021-11-13 01:39:45,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:45,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410282059] [2021-11-13 01:39:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:45,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:45,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:45,572 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:45,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:39:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:46,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:39:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:39:47,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:47,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410282059] [2021-11-13 01:39:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410282059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996338007] [2021-11-13 01:39:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:47,234 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:47,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-13 01:39:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-13 01:39:48,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 37 proven. 19 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 01:39:49,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996338007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:49,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938949729] [2021-11-13 01:39:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:49,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:49,090 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:49,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 01:39:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:39:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:39:50,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 01:39:51,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938949729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:51,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:39:51,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-13 01:39:51,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696416069] [2021-11-13 01:39:51,312 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:39:51,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:39:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:39:51,315 INFO L87 Difference]: Start difference. First operand 701 states and 839 transitions. Second operand has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:39:54,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:54,390 INFO L93 Difference]: Finished difference Result 2955 states and 3656 transitions. [2021-11-13 01:39:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:39:54,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 279 [2021-11-13 01:39:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:54,404 INFO L225 Difference]: With dead ends: 2955 [2021-11-13 01:39:54,404 INFO L226 Difference]: Without dead ends: 2301 [2021-11-13 01:39:54,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1658 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:39:54,407 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 2383 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2571.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 6169 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.98ms SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2828.41ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:54,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 6169 Invalid, 776 Unknown, 0 Unchecked, 13.98ms Time], IncrementalHoareTripleChecker [227 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 2828.41ms Time] [2021-11-13 01:39:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-13 01:39:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1947. [2021-11-13 01:39:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1878 states have (on average 1.174653887113951) internal successors, (2206), 1890 states have internal predecessors, (2206), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 01:39:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2353 transitions. [2021-11-13 01:39:54,500 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2353 transitions. Word has length 279 [2021-11-13 01:39:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:54,500 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2353 transitions. [2021-11-13 01:39:54,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.0) internal successors, (630), 14 states have internal predecessors, (630), 4 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 01:39:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2353 transitions. [2021-11-13 01:39:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2021-11-13 01:39:54,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:54,510 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:39:54,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:54,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-13 01:39:55,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:55,125 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:39:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -889533929, now seen corresponding path program 2 times [2021-11-13 01:39:55,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:55,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954293685] [2021-11-13 01:39:55,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:39:55,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:55,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:55,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:39:56,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:39:56,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:39:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:39:57,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:39:59,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:39:59,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954293685] [2021-11-13 01:39:59,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954293685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:59,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110850591] [2021-11-13 01:39:59,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:39:59,424 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:39:59,425 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:39:59,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 01:40:02,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:40:02,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:40:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:40:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 245 proven. 10 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2021-11-13 01:40:03,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 1342 trivial. 0 not checked. [2021-11-13 01:40:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110850591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:40:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797700961] [2021-11-13 01:40:05,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:40:05,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:40:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:40:05,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:40:05,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 01:40:06,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:40:06,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:40:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:40:06,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 274 proven. 3 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2021-11-13 01:40:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1594 backedges. 198 proven. 31 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-13 01:40:08,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797700961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:40:08,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:40:08,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 6, 6] total 20 [2021-11-13 01:40:08,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168910982] [2021-11-13 01:40:08,828 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:40:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 01:40:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 01:40:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:40:08,831 INFO L87 Difference]: Start difference. First operand 1947 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:40:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:10,112 INFO L93 Difference]: Finished difference Result 3873 states and 4886 transitions. [2021-11-13 01:40:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 01:40:10,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 679 [2021-11-13 01:40:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:10,123 INFO L225 Difference]: With dead ends: 3873 [2021-11-13 01:40:10,123 INFO L226 Difference]: Without dead ends: 1967 [2021-11-13 01:40:10,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4093 GetRequests, 4050 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=1426, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 01:40:10,129 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 173 mSDsluCounter, 2341 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 421.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 474.08ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:10,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2642 Invalid, 379 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [87 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 474.08ms Time] [2021-11-13 01:40:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-11-13 01:40:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1959. [2021-11-13 01:40:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1890 states have (on average 1.1756613756613756) internal successors, (2222), 1902 states have internal predecessors, (2222), 63 states have call successors, (63), 3 states have call predecessors, (63), 4 states have return successors, (84), 55 states have call predecessors, (84), 63 states have call successors, (84) [2021-11-13 01:40:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2369 transitions. [2021-11-13 01:40:10,227 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2369 transitions. Word has length 679 [2021-11-13 01:40:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:10,228 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2369 transitions. [2021-11-13 01:40:10,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.5) internal successors, (230), 20 states have internal predecessors, (230), 2 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 01:40:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2369 transitions. [2021-11-13 01:40:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-11-13 01:40:10,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:10,238 INFO L514 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:40:10,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:10,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:10,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-13 01:40:10,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:40:10,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1901317097, now seen corresponding path program 3 times [2021-11-13 01:40:10,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:10,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365511054] [2021-11-13 01:40:10,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:40:10,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:10,858 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:10,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9982ef-b41b-4141-a921-1147feb881b7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process