./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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 9c302c0a70f15041d912ede4a343504399632b0722d257e8570893a260b2b8dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:03:45,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:03:45,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:03:45,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:03:45,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:03:45,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:03:45,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:03:45,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:03:45,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:03:45,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:03:45,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:03:45,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:03:45,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:03:45,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:03:45,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:03:45,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:03:45,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:03:45,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:03:45,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:03:45,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:03:45,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:03:45,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:03:45,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:03:45,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:03:45,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:03:45,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:03:45,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:03:45,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:03:45,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:03:45,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:03:45,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:03:45,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:03:45,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:03:45,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:03:45,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:03:45,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:03:45,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:03:45,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:03:45,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:03:45,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:03:45,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:03:45,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:03:45,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:03:45,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:03:45,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:03:45,491 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:03:45,491 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:03:45,492 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:03:45,492 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:03:45,492 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:03:45,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:03:45,493 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:03:45,500 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:03:45,500 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:03:45,501 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:03:45,501 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:03:45,501 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:03:45,502 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:03:45,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:03:45,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:03:45,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:03:45,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:03:45,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:03:45,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:03:45,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:03:45,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:03:45,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:03:45,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:03:45,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:03:45,505 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:03:45,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:03:45,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:03:45,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:03:45,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:45,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:03:45,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:03:45,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:03:45,509 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:03:45,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:03:45,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:03:45,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:03:45,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:03:45,510 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c302c0a70f15041d912ede4a343504399632b0722d257e8570893a260b2b8dc [2021-11-12 23:03:45,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:03:45,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:03:45,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:03:45,905 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:03:45,906 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:03:45,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i [2021-11-12 23:03:45,987 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/d8f4668fe/973b738fdf2a488980419b4c30460c15/FLAGe6ccc19a3 [2021-11-12 23:03:46,896 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:03:46,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i [2021-11-12 23:03:46,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/d8f4668fe/973b738fdf2a488980419b4c30460c15/FLAGe6ccc19a3 [2021-11-12 23:03:47,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/d8f4668fe/973b738fdf2a488980419b4c30460c15 [2021-11-12 23:03:47,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:03:47,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:03:47,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:47,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:03:47,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:03:47,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:47" (1/1) ... [2021-11-12 23:03:47,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c93cc40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:47, skipping insertion in model container [2021-11-12 23:03:47,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:47" (1/1) ... [2021-11-12 23:03:47,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:03:47,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:48,192 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[33021,33034] [2021-11-12 23:03:48,530 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[84583,84596] [2021-11-12 23:03:48,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:48,564 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:03:48,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e576904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:48, skipping insertion in model container [2021-11-12 23:03:48,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:48,566 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:03:48,569 INFO L158 Benchmark]: Toolchain (without parser) took 1159.24ms. Allocated memory is still 117.4MB. Free memory was 82.4MB in the beginning and 70.5MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:03:48,570 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:03:48,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1155.71ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 70.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:03:48,573 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 70.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1155.71ms. Allocated memory is still 117.4MB. Free memory was 82.1MB in the beginning and 70.5MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2221]: 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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 9c302c0a70f15041d912ede4a343504399632b0722d257e8570893a260b2b8dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:03:51,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:03:51,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:03:51,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:03:51,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:03:51,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:03:51,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:03:51,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:03:51,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:03:51,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:03:51,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:03:51,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:03:51,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:03:51,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:03:51,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:03:51,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:03:51,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:03:51,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:03:51,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:03:51,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:03:51,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:03:51,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:03:51,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:03:51,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:03:51,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:03:51,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:03:51,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:03:51,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:03:51,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:03:51,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:03:51,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:03:51,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:03:51,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:03:51,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:03:51,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:03:51,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:03:51,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:03:51,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:03:51,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:03:51,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:03:51,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:03:51,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:03:51,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:03:51,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:03:51,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:03:51,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:03:51,330 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:03:51,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:03:51,331 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:03:51,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:03:51,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:03:51,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:03:51,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:03:51,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:03:51,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:03:51,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:03:51,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:03:51,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:03:51,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:03:51,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:03:51,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:03:51,337 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:03:51,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:03:51,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:03:51,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:03:51,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:03:51,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:03:51,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:03:51,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:03:51,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:51,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:03:51,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:03:51,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:03:51,339 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:03:51,340 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:03:51,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:03:51,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:03:51,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:03:51,341 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c302c0a70f15041d912ede4a343504399632b0722d257e8570893a260b2b8dc [2021-11-12 23:03:51,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:03:51,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:03:51,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:03:51,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:03:51,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:03:51,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i [2021-11-12 23:03:51,913 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/77ff0f60d/002e5dbeb0c24390b99abd9b8b016169/FLAGfef199a85 [2021-11-12 23:03:52,792 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:03:52,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i [2021-11-12 23:03:52,839 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/77ff0f60d/002e5dbeb0c24390b99abd9b8b016169/FLAGfef199a85 [2021-11-12 23:03:53,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/data/77ff0f60d/002e5dbeb0c24390b99abd9b8b016169 [2021-11-12 23:03:53,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:03:53,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:03:53,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:53,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:03:53,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:03:53,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:53" (1/1) ... [2021-11-12 23:03:53,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ffea98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:53, skipping insertion in model container [2021-11-12 23:03:53,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:03:53" (1/1) ... [2021-11-12 23:03:53,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:03:53,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:54,149 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[33021,33034] [2021-11-12 23:03:54,523 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[84583,84596] [2021-11-12 23:03:54,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:54,555 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:03:54,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:03:54,611 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[33021,33034] [2021-11-12 23:03:54,792 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[84583,84596] [2021-11-12 23:03:54,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:54,807 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:03:54,866 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[33021,33034] [2021-11-12 23:03:55,027 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_cb018f5d-8354-41cc-aa4a-4f6465caaefd/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-2.i[84583,84596] [2021-11-12 23:03:55,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:03:55,100 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:03:55,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55 WrapperNode [2021-11-12 23:03:55,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:03:55,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:03:55,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:03:55,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:03:55,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:03:55,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:03:55,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:03:55,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:03:55,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:03:55,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:03:55,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:03:55,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:03:55,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (1/1) ... [2021-11-12 23:03:55,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:03:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:03:55,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:03:55,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:03:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:03:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:03:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-12 23:03:55,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-12 23:03:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:03:55,735 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:03:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:03:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:03:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:03:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 23:03:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:03:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:03:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:03:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:03:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:03:55,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:04:05,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:04:05,307 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-12 23:04:05,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:05 BoogieIcfgContainer [2021-11-12 23:04:05,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:04:05,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:04:05,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:04:05,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:04:05,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:03:53" (1/3) ... [2021-11-12 23:04:05,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ffff5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:05, skipping insertion in model container [2021-11-12 23:04:05,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:03:55" (2/3) ... [2021-11-12 23:04:05,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ffff5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:04:05, skipping insertion in model container [2021-11-12 23:04:05,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:04:05" (3/3) ... [2021-11-12 23:04:05,347 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test9-2.i [2021-11-12 23:04:05,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:04:05,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 23:04:05,427 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:04:05,447 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:04:05,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 23:04:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:04:05,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:05,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:05,520 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-11-12 23:04:05,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:05,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294994141] [2021-11-12 23:04:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:05,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:05,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:05,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:05,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:04:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:04:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:05,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:05,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:05,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:05,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294994141] [2021-11-12 23:04:05,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294994141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:05,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:05,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:04:05,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067757874] [2021-11-12 23:04:05,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:04:05,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:05,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:04:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:04:05,879 INFO L87 Difference]: Start difference. First operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-12 23:04:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:06,057 INFO L93 Difference]: Finished difference Result 2390 states and 5142 transitions. [2021-11-12 23:04:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:04:06,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-12 23:04:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:06,104 INFO L225 Difference]: With dead ends: 2390 [2021-11-12 23:04:06,104 INFO L226 Difference]: Without dead ends: 1163 [2021-11-12 23:04:06,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:04:06,121 INFO L933 BasicCegarLoop]: 2253 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, 2253 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:06,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 15.28ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:04:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-11-12 23:04:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-11-12 23:04:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-11-12 23:04:06,575 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-11-12 23:04:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:06,576 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-11-12 23:04:06,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-12 23:04:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-11-12 23:04:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:04:06,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:06,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:06,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:06,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:06,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-11-12 23:04:06,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:06,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707836451] [2021-11-12 23:04:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:06,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:06,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:04:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:07,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:07,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:07,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707836451] [2021-11-12 23:04:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707836451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:07,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-12 23:04:07,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369299143] [2021-11-12 23:04:07,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:07,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:04:07,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:04:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:07,490 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-12 23:04:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:08,763 INFO L93 Difference]: Finished difference Result 2240 states and 4307 transitions. [2021-11-12 23:04:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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 44 [2021-11-12 23:04:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:08,777 INFO L225 Difference]: With dead ends: 2240 [2021-11-12 23:04:08,777 INFO L226 Difference]: Without dead ends: 1172 [2021-11-12 23:04:08,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:08,784 INFO L933 BasicCegarLoop]: 2183 mSDtfsCounter, 2137 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 884.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 4988 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.15ms SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1057.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 4988 Invalid, 594 Unknown, 0 Unchecked, 45.15ms Time], IncrementalHoareTripleChecker [558 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 1057.36ms Time] [2021-11-12 23:04:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-12 23:04:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1166. [2021-11-12 23:04:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 659 states have (on average 1.817905918057663) internal successors, (1198), 1160 states have internal predecessors, (1198), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2204 transitions. [2021-11-12 23:04:09,090 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2204 transitions. Word has length 44 [2021-11-12 23:04:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 2204 transitions. [2021-11-12 23:04:09,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2021-11-12 23:04:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2204 transitions. [2021-11-12 23:04:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:04:09,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:09,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:09,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:09,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:09,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1193374541, now seen corresponding path program 1 times [2021-11-12 23:04:09,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:09,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096142107] [2021-11-12 23:04:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:09,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:09,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:04:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:04:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:09,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:10,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:10,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096142107] [2021-11-12 23:04:10,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096142107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:10,061 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:10,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 8 [2021-11-12 23:04:10,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936102076] [2021-11-12 23:04:10,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:10,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:04:10,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:04:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:10,063 INFO L87 Difference]: Start difference. First operand 1166 states and 2204 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-12 23:04:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:12,865 INFO L93 Difference]: Finished difference Result 2236 states and 4284 transitions. [2021-11-12 23:04:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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 44 [2021-11-12 23:04:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:12,876 INFO L225 Difference]: With dead ends: 2236 [2021-11-12 23:04:12,877 INFO L226 Difference]: Without dead ends: 1165 [2021-11-12 23:04:12,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:04:12,886 INFO L933 BasicCegarLoop]: 2183 mSDtfsCounter, 1051 mSDsluCounter, 6278 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2333.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 8461 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.55ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2605.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:12,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 8461 Invalid, 1585 Unknown, 0 Unchecked, 30.55ms Time], IncrementalHoareTripleChecker [10 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 2605.14ms Time] [2021-11-12 23:04:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-11-12 23:04:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1160. [2021-11-12 23:04:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 653 states have (on average 1.8192955589586524) internal successors, (1188), 1154 states have internal predecessors, (1188), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 2194 transitions. [2021-11-12 23:04:13,119 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 2194 transitions. Word has length 44 [2021-11-12 23:04:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:13,120 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 2194 transitions. [2021-11-12 23:04:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 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) [2021-11-12 23:04:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 2194 transitions. [2021-11-12 23:04:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-12 23:04:13,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:13,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:13,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:13,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -440422729, now seen corresponding path program 1 times [2021-11-12 23:04:13,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:13,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118609158] [2021-11-12 23:04:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:13,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:13,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:13,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:04:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:13,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:13,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:04:13,694 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-12 23:04:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-12 23:04:13,770 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-12 23:04:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-12 23:04:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:13,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:14,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:14,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118609158] [2021-11-12 23:04:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118609158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:14,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:14,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:04:14,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988025779] [2021-11-12 23:04:14,033 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:14,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:04:14,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:04:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:14,034 INFO L87 Difference]: Start difference. First operand 1160 states and 2194 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2021-11-12 23:04:18,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:26,731 INFO L93 Difference]: Finished difference Result 4383 states and 8450 transitions. [2021-11-12 23:04:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:04:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 44 [2021-11-12 23:04:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:26,766 INFO L225 Difference]: With dead ends: 4383 [2021-11-12 23:04:26,766 INFO L226 Difference]: Without dead ends: 3317 [2021-11-12 23:04:26,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:26,776 INFO L933 BasicCegarLoop]: 3165 mSDtfsCounter, 3291 mSDsluCounter, 5850 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 507 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11253.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4291 SdHoareTripleChecker+Valid, 9015 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.35ms SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12246.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:26,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4291 Valid, 9015 Invalid, 1638 Unknown, 0 Unchecked, 49.35ms Time], IncrementalHoareTripleChecker [507 Valid, 1130 Invalid, 1 Unknown, 0 Unchecked, 12246.09ms Time] [2021-11-12 23:04:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2021-11-12 23:04:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 1162. [2021-11-12 23:04:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 655 states have (on average 1.816793893129771) internal successors, (1190), 1156 states have internal predecessors, (1190), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 2196 transitions. [2021-11-12 23:04:27,310 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 2196 transitions. Word has length 44 [2021-11-12 23:04:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:27,311 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 2196 transitions. [2021-11-12 23:04:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2021-11-12 23:04:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 2196 transitions. [2021-11-12 23:04:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:04:27,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:27,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:27,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:27,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:27,529 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:27,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1363006627, now seen corresponding path program 1 times [2021-11-12 23:04:27,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:27,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161972515] [2021-11-12 23:04:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:27,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:27,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:27,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:27,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:04:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:28,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:28,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:28,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161972515] [2021-11-12 23:04:28,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161972515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:28,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:28,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:04:28,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742976338] [2021-11-12 23:04:28,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:28,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:04:28,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:04:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:28,331 INFO L87 Difference]: Start difference. First operand 1162 states and 2196 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-11-12 23:04:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:29,409 INFO L93 Difference]: Finished difference Result 2329 states and 4400 transitions. [2021-11-12 23:04:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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 96 [2021-11-12 23:04:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:29,421 INFO L225 Difference]: With dead ends: 2329 [2021-11-12 23:04:29,421 INFO L226 Difference]: Without dead ends: 1171 [2021-11-12 23:04:29,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:29,429 INFO L933 BasicCegarLoop]: 2172 mSDtfsCounter, 2321 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 777.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2824 SdHoareTripleChecker+Valid, 4852 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.17ms SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 922.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:29,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2824 Valid, 4852 Invalid, 578 Unknown, 0 Unchecked, 17.17ms Time], IncrementalHoareTripleChecker [540 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 922.52ms Time] [2021-11-12 23:04:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-12 23:04:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1165. [2021-11-12 23:04:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.8009118541033435) internal successors, (1185), 1159 states have internal predecessors, (1185), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-12 23:04:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2191 transitions. [2021-11-12 23:04:29,654 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2191 transitions. Word has length 96 [2021-11-12 23:04:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:29,654 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2191 transitions. [2021-11-12 23:04:29,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2021-11-12 23:04:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2191 transitions. [2021-11-12 23:04:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:04:29,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:29,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:29,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:29,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-11-12 23:04:29,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:29,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643417527] [2021-11-12 23:04:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:29,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:29,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:29,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:29,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:04:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:30,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:30,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:30,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643417527] [2021-11-12 23:04:30,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643417527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:30,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624949810] [2021-11-12 23:04:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:30,853 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:04:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:04:30,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:04:30,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 23:04:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:31,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:32,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624949810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:32,119 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:04:32,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4, 4] total 5 [2021-11-12 23:04:32,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861494762] [2021-11-12 23:04:32,119 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:32,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:32,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:32,121 INFO L87 Difference]: Start difference. First operand 1165 states and 2191 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-12 23:04:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:32,933 INFO L93 Difference]: Finished difference Result 3450 states and 6521 transitions. [2021-11-12 23:04:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2021-11-12 23:04:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:32,955 INFO L225 Difference]: With dead ends: 3450 [2021-11-12 23:04:32,955 INFO L226 Difference]: Without dead ends: 2289 [2021-11-12 23:04:32,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:04:32,963 INFO L933 BasicCegarLoop]: 2715 mSDtfsCounter, 1104 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 553.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 4865 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.07ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 580.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:32,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 4865 Invalid, 19 Unknown, 0 Unchecked, 11.07ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 580.29ms Time] [2021-11-12 23:04:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-12 23:04:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2021-11-12 23:04:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1279 states have (on average 1.8162627052384674) internal successors, (2323), 2280 states have internal predecessors, (2323), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 2 states have return successors, (1004), 6 states have call predecessors, (1004), 1004 states have call successors, (1004) [2021-11-12 23:04:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 4331 transitions. [2021-11-12 23:04:33,517 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 4331 transitions. Word has length 96 [2021-11-12 23:04:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 4331 transitions. [2021-11-12 23:04:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2021-11-12 23:04:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 4331 transitions. [2021-11-12 23:04:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:04:33,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:33,529 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:33,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:33,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:33,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:33,932 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash -824271743, now seen corresponding path program 1 times [2021-11-12 23:04:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753872825] [2021-11-12 23:04:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:33,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:33,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:33,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:04:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:34,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:35,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:35,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753872825] [2021-11-12 23:04:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753872825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:35,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:04:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:04:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667167279] [2021-11-12 23:04:35,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:04:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:04:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:35,564 INFO L87 Difference]: Start difference. First operand 2287 states and 4331 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-12 23:04:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:36,957 INFO L93 Difference]: Finished difference Result 3517 states and 6588 transitions. [2021-11-12 23:04:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:04:36,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 103 [2021-11-12 23:04:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:36,980 INFO L225 Difference]: With dead ends: 3517 [2021-11-12 23:04:36,980 INFO L226 Difference]: Without dead ends: 2365 [2021-11-12 23:04:36,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:04:36,988 INFO L933 BasicCegarLoop]: 2716 mSDtfsCounter, 1019 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1102.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 4877 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1128.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:36,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 4877 Invalid, 16 Unknown, 0 Unchecked, 12.78ms Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 1128.21ms Time] [2021-11-12 23:04:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-11-12 23:04:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2363. [2021-11-12 23:04:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 1355 states have (on average 1.7734317343173431) internal successors, (2403), 2356 states have internal predecessors, (2403), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 2 states have return successors, (1004), 6 states have call predecessors, (1004), 1004 states have call successors, (1004) [2021-11-12 23:04:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 4411 transitions. [2021-11-12 23:04:37,529 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 4411 transitions. Word has length 103 [2021-11-12 23:04:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:37,529 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 4411 transitions. [2021-11-12 23:04:37,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2021-11-12 23:04:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 4411 transitions. [2021-11-12 23:04:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:04:37,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:37,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:37,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:37,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:37,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -892194403, now seen corresponding path program 1 times [2021-11-12 23:04:37,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:37,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739169441] [2021-11-12 23:04:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:37,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:37,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:04:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:04:38,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:04:38,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739169441] [2021-11-12 23:04:38,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739169441] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:04:38,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:04:38,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:04:38,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804832510] [2021-11-12 23:04:38,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:38,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:38,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:04:38,719 INFO L87 Difference]: Start difference. First operand 2363 states and 4411 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2021-11-12 23:04:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:39,011 INFO L93 Difference]: Finished difference Result 4684 states and 8780 transitions. [2021-11-12 23:04:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:39,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 111 [2021-11-12 23:04:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:39,035 INFO L225 Difference]: With dead ends: 4684 [2021-11-12 23:04:39,035 INFO L226 Difference]: Without dead ends: 2366 [2021-11-12 23:04:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:04:39,046 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 2 mSDsluCounter, 4356 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6536 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:39,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6536 Invalid, 13 Unknown, 0 Unchecked, 34.46ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 31.27ms Time] [2021-11-12 23:04:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-11-12 23:04:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2366. [2021-11-12 23:04:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1357 states have (on average 1.7730287398673545) internal successors, (2406), 2359 states have internal predecessors, (2406), 1004 states have call successors, (1004), 2 states have call predecessors, (1004), 3 states have return successors, (1006), 6 states have call predecessors, (1006), 1004 states have call successors, (1006) [2021-11-12 23:04:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 4416 transitions. [2021-11-12 23:04:39,679 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 4416 transitions. Word has length 111 [2021-11-12 23:04:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:39,680 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 4416 transitions. [2021-11-12 23:04:39,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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) [2021-11-12 23:04:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 4416 transitions. [2021-11-12 23:04:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:04:39,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:39,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:39,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:39,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:39,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1639947589, now seen corresponding path program 1 times [2021-11-12 23:04:39,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:39,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601937309] [2021-11-12 23:04:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:39,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:39,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:39,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:04:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:04:40,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:40,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:40,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601937309] [2021-11-12 23:04:40,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601937309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:40,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [652465460] [2021-11-12 23:04:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:40,859 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:04:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:04:40,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:04:40,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 23:04:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:04:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:41,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:04:41,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [652465460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:04:41,969 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:04:41,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 23:04:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861178122] [2021-11-12 23:04:41,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:04:41,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:04:41,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:04:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:04:41,972 INFO L87 Difference]: Start difference. First operand 2366 states and 4416 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-12 23:04:44,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:47,392 INFO L93 Difference]: Finished difference Result 3646 states and 6741 transitions. [2021-11-12 23:04:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:04:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 113 [2021-11-12 23:04:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:47,409 INFO L225 Difference]: With dead ends: 3646 [2021-11-12 23:04:47,409 INFO L226 Difference]: Without dead ends: 1325 [2021-11-12 23:04:47,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:47,425 INFO L933 BasicCegarLoop]: 2182 mSDtfsCounter, 2230 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1003 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4831.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2230 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.43ms SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5198.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:47,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2230 Valid, 3249 Invalid, 1053 Unknown, 0 Unchecked, 20.43ms Time], IncrementalHoareTripleChecker [1003 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 5198.22ms Time] [2021-11-12 23:04:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-12 23:04:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1209. [2021-11-12 23:04:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 701 states have (on average 1.7560627674750358) internal successors, (1231), 1203 states have internal predecessors, (1231), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 23:04:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2238 transitions. [2021-11-12 23:04:47,783 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2238 transitions. Word has length 113 [2021-11-12 23:04:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:47,784 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2238 transitions. [2021-11-12 23:04:47,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2021-11-12 23:04:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2238 transitions. [2021-11-12 23:04:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:04:47,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:47,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:47,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:48,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:48,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:04:48,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash 137059189, now seen corresponding path program 1 times [2021-11-12 23:04:48,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:48,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074621372] [2021-11-12 23:04:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:48,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:48,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:48,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:04:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:04:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:48,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074621372] [2021-11-12 23:04:48,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074621372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616207964] [2021-11-12 23:04:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:48,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:04:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:04:48,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:04:48,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:04:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:04:49,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:49,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1616207964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:49,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222623365] [2021-11-12 23:04:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:04:49,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:49,768 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:49,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:04:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:04:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:04:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:50,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:04:50,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222623365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:50,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:04:50,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-12 23:04:50,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219036815] [2021-11-12 23:04:50,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:50,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:04:50,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:04:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:04:50,488 INFO L87 Difference]: Start difference. First operand 1209 states and 2238 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:04:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:51,084 INFO L93 Difference]: Finished difference Result 2385 states and 4449 transitions. [2021-11-12 23:04:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:04:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 120 [2021-11-12 23:04:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:51,095 INFO L225 Difference]: With dead ends: 2385 [2021-11-12 23:04:51,095 INFO L226 Difference]: Without dead ends: 1224 [2021-11-12 23:04:51,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:04:51,101 INFO L933 BasicCegarLoop]: 2179 mSDtfsCounter, 54 mSDsluCounter, 8698 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 10877 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.72ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:51,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 10877 Invalid, 96 Unknown, 0 Unchecked, 14.72ms Time], IncrementalHoareTripleChecker [34 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 171.68ms Time] [2021-11-12 23:04:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-12 23:04:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1220. [2021-11-12 23:04:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 711 states have (on average 1.7566807313642756) internal successors, (1249), 1213 states have internal predecessors, (1249), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 23:04:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 2256 transitions. [2021-11-12 23:04:51,333 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 2256 transitions. Word has length 120 [2021-11-12 23:04:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:51,333 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 2256 transitions. [2021-11-12 23:04:51,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-12 23:04:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 2256 transitions. [2021-11-12 23:04:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:04:51,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:51,336 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:51,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:51,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:51,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:51,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:51,953 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash -14237485, now seen corresponding path program 2 times [2021-11-12 23:04:51,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:51,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366541039] [2021-11-12 23:04:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:04:51,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:51,955 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:51,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:04:52,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:04:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:04:52,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:04:53,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:04:53,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366541039] [2021-11-12 23:04:53,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366541039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:53,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848330892] [2021-11-12 23:04:53,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:04:53,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:04:53,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:04:53,072 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:04:53,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:04:53,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:04:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:04:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:04:54,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:04:54,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848330892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:54,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51998752] [2021-11-12 23:04:54,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:04:54,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:04:54,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:04:54,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:04:54,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:04:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:04:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:04:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:04:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:04:55,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:04:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:04:55,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51998752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:04:55,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:04:55,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 23:04:55,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361931311] [2021-11-12 23:04:55,893 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:04:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:04:55,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:04:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:04:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:04:55,895 INFO L87 Difference]: Start difference. First operand 1220 states and 2256 transitions. Second operand has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:04:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:04:57,318 INFO L93 Difference]: Finished difference Result 2403 states and 4474 transitions. [2021-11-12 23:04:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:04:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-11-12 23:04:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:04:57,337 INFO L225 Difference]: With dead ends: 2403 [2021-11-12 23:04:57,337 INFO L226 Difference]: Without dead ends: 1233 [2021-11-12 23:04:57,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 23:04:57,347 INFO L933 BasicCegarLoop]: 2182 mSDtfsCounter, 83 mSDsluCounter, 10907 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 441.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 13089 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.95ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:04:57,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 13089 Invalid, 269 Unknown, 0 Unchecked, 21.95ms Time], IncrementalHoareTripleChecker [58 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 504.53ms Time] [2021-11-12 23:04:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-12 23:04:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1227. [2021-11-12 23:04:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 718 states have (on average 1.7493036211699164) internal successors, (1256), 1220 states have internal predecessors, (1256), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-12 23:04:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2263 transitions. [2021-11-12 23:04:57,659 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2263 transitions. Word has length 126 [2021-11-12 23:04:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:04:57,660 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 2263 transitions. [2021-11-12 23:04:57,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.9) internal successors, (138), 20 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 23:04:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2263 transitions. [2021-11-12 23:04:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:04:57,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:04:57,663 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:04:57,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:57,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:58,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:04:58,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:04:58,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:04:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:04:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1200200847, now seen corresponding path program 3 times [2021-11-12 23:04:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:04:58,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801023603] [2021-11-12 23:04:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:04:58,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:04:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:04:58,276 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:04:58,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:05:01,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:05:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:05:01,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:05:02,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:05:02,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:05:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801023603] [2021-11-12 23:05:02,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801023603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:02,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289757789] [2021-11-12 23:05:02,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:05:02,927 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:05:02,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:05:02,928 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:05:02,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:05:29,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:05:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:05:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:05:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:05:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:05:30,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:05:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 70 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:05:30,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289757789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:05:30,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634602543] [2021-11-12 23:05:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:05:30,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:05:30,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:05:30,610 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:05:30,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb018f5d-8354-41cc-aa4a-4f6465caaefd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process